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primary alcohol ethanol (ethyl alcohol), which is used as a drug and is the main alcohol present in alcoholic beverages. An important class of alcohols, of

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This article is about the class of chemical compounds. For ethanol found in alcoholic drinks, see Alcohol (drug). For other uses, see Alcohol (disambiguation).

Ball-and-stick model of an alcohol molecule (R3COH). The red and grey balls represent the hydroxyl group (-OH). The three "R's" stand for carbon substituents or hydrogen atoms.[1] The bond angle between an hydroxyl group (-OH) and a chain of carbon atoms (R)

In chemistry, an alcohol is any organic compound in which the hydroxyl functional group (–OH) is bound to a carbon.[2] The term alcohol originally referred to the primary alcohol ethanol (ethyl alcohol), which is used as a drug and is the main alcohol present in alcoholic beverages. An important class of alcohols, of which methanol and ethanol are the simplest members, includes all compounds for which the general formula is CnH2n+1OH. It is these simple monoalcohols that are the subject of this article.

The suffix -ol appears in the IUPAC chemical name of all substances where the hydroxyl group is the functional group with the highest priority. When a higher priority group is present in the compound, the prefix hydroxy- is used in its IUPAC name. The suffix -ol in non-IUPAC names (such as paracetamol or cholesterol) also typically indicates that the substance is an alcohol. However, many substances that contain hydroxyl functional groups (particularly sugars, such as glucose and sucrose) have names which include neither the suffix -ol, nor the prefix hydroxy-.

.mw-parser-output .toclimit-2 .toclevel-1 ul,.mw-parser-output .toclimit-3 .toclevel-2 ul,.mw-parser-output .toclimit-4 .toclevel-3 ul,.mw-parser-output .toclimit-5 .toclevel-4 ul,.mw-parser-output .toclimit-6 .toclevel-5 ul,.mw-parser-output .toclimit-7 .toclevel-6 ul{display:none}Contents
  • 1 History
  • 2 Nomenclature
    • 2.1 Etymology
    • 2.2 Systematic names
    • 2.3 Common names
  • 3 Applications
  • 4 Toxicity
  • 5 Physical properties
  • 6 Occurrence in nature
  • 7 Production
    • 7.1 Ziegler and oxo processes
    • 7.2 Hydration reactions
    • 7.3 Biological routes
      • 7.3.1 Substitution
      • 7.3.2 Reduction
      • 7.3.3 Hydrolysis
  • 8 Reactions
    • 8.1 Deprotonation
    • 8.2 Nucleophilic substitution
    • 8.3 Dehydration
    • 8.4 Esterification
    • 8.5 Oxidation
  • 9 See also
  • 10 Notes
  • 11 References
  • 12 External links

Alcohol distillation likely originated in India. During 2000 BCE, people of India used an alcoholic drink called Sura.[3] Alcohol distillation was known to Islamic chemists as early as the eighth century.[4][5]

The Arab chemist, al-Kindi, unambiguously described the distillation of wine in a treatise titled as "The Book of the chemistry of Perfume and Distillations".[6][7][8]

The Persian physician, alchemist, polymath and philosopher Rhazes (854 CE – 925 CE)[9] is credited with the discovery of ethanol.[10][11]

Nomenclature Etymology

The word "alcohol" is from the Arabic kohl (Arabic: الكحل‎, romanized: al-kuḥl), a powder used as an eyeliner.[12] Al- is the Arabic definite article, equivalent to the in English. Alcohol was originally used for the very fine powder produced by the sublimation of the natural mineral stibnite to form antimony trisulfide Sb
3. It was considered to be the essence or "spirit" of this mineral. It was used as an antiseptic, eyeliner, and cosmetic. The meaning of alcohol was extended to distilled substances in general, and then narrowed to ethanol, when "spirits" was a synonym for hard liquor.[13]

Bartholomew Traheron, in his 1543 translation of John of Vigo, introduces the word as a term used by "barbarous" (Moorish) authors for "fine powder." Vigo wrote: "the barbarous auctours use alcohol, or (as I fynde it sometymes wryten) alcofoll, for moost fine poudre."[14]

The 1657 Lexicon Chymicum, by William Johnson glosses the word as "antimonium sive stibium."[15] By extension, the word came to refer to any fluid obtained by distillation, including "alcohol of wine," the distilled essence of wine. Libavius in Alchymia (1594) refers to "vini alcohol vel vinum alcalisatum". Johnson (1657) glosses alcohol vini as "quando omnis superfluitas vini a vino separatur, ita ut accensum ardeat donec totum consumatur, nihilque fæcum aut phlegmatis in fundo remaneat." The word's meaning became restricted to "spirit of wine" (the chemical known today as ethanol) in the 18th century and was extended to the class of substances so-called as "alcohols" in modern chemistry after 1850.[14]

The term ethanol was invented 1892, combining the word ethane with the "-ol" ending of "alcohol".[16]

Systematic names

IUPAC nomenclature is used in scientific publications and where precise identification of the substance is important, especially in cases where the relative complexity of the molecule does not make such a systematic name unwieldy. In naming simple alcohols, the name of the alkane chain loses the terminal e and adds the suffix -ol, e.g., as in "ethanol" from the alkane chain name "ethane".[17] When necessary, the position of the hydroxyl group is indicated by a number between the alkane name and the -ol: propan-1-ol for CH
2OH, propan-2-ol for CH
3. If a higher priority group is present (such as an aldehyde, ketone, or carboxylic acid), then the prefix hydroxy-is used,[17] e.g., as in 1-hydroxy-2-propanone (CH

Some examples of simple alcohols and how to name them CH3–CH2–CH2–OH n-propyl alcohol,
propan-1-ol, or
1-propanol isopropyl alcohol,
propan-2-ol, or
2-propanol cyclohexanol isobutyl alcohol,
2-methylpropan-1-ol, or
2-methyl-1-propanol tert-amyl alcohol,
2-methylbutan-2-ol, or
2-methyl-2-butanol A primary alcohol A secondary alcohol A secondary alcohol A primary alcohol A tertiary alcohol

In cases where the OH functional group is bonded to an sp2 carbon on an aromatic ring the molecule is known as a phenol, and is named using the IUPAC rules for naming phenols.[19]

Common names

In other less formal contexts, an alcohol is often called with the name of the corresponding alkyl group followed by the word "alcohol", e.g., methyl alcohol, ethyl alcohol. Propyl alcohol may be n-propyl alcohol or isopropyl alcohol, depending on whether the hydroxyl group is bonded to the end or middle carbon on the straight propane chain. As described under systematic naming, if another group on the molecule takes priority, the alcohol moiety is often indicated using the "hydroxy-" prefix.[20]

Alcohols are then classified into primary, secondary (sec-, s-), and tertiary (tert-, t-), based upon the number of carbon atoms connected to the carbon atom that bears the hydroxyl functional group. (The respective numeric shorthands 1°, 2°, and 3° are also sometimes used in informal settings.[21]) The primary alcohols have general formulas RCH2OH. The simplest primary alcohol is methanol (CH3OH), for which R=H, and the next is ethanol, for which R=CH3, the methyl group. Secondary alcohols are those of the form RR'CHOH, the simplest of which is 2-propanol (R=R'=CH3). For the tertiary alcohols the general form is RR'R"COH. The simplest example is tert-butanol (2-methylpropan-2-ol), for which each of R, R', and R" is CH3. In these shorthands, R, R', and R" represent substituents, alkyl or other attached, generally organic groups.

In archaic nomenclature, alcohols can be named as derivatives of methanol using "-carbinol" as the ending. For instance, (CH3)3COH can be named trimethylcarbinol.

Type Formula IUPAC Name Common name Monohydric
alcohols CH3OH Methanol Wood alcohol C2H5OH Ethanol Alcohol C3H7OH Propan-2-ol Isopropyl alcohol,
Rubbing alcohol C4H9OH Butan-1-ol Butanol,
Butyl alcohol C5H11OH Pentan-1-ol Pentanol,
Amyl alcohol C16H33OH Hexadecan-1-ol Cetyl alcohol Polyhydric
alcohols C2H4(OH)2 Ethane-1,2-diol Ethylene glycol C3H6(OH)2 Propane-1,2-diol Propylene glycol C3H5(OH)3 Propane-1,2,3-triol Glycerol C4H6(OH)4 Butane-1,2,3,4-tetraol Erythritol,
Threitol C5H7(OH)5 Pentane-1,2,3,4,5-pentol Xylitol C6H8(OH)6 hexane-1,2,3,4,5,6-hexol Mannitol,
Sorbitol C7H9(OH)7 Heptane-1,2,3,4,5,6,7-heptol Volemitol Unsaturated
alcohols C3H5OH Prop-2-ene-1-ol Allyl alcohol C10H17OH 3,7-Dimethylocta-2,6-dien-1-ol Geraniol C3H3OH Prop-2-yn-1-ol Propargyl alcohol Alicyclic
alcohols C6H6(OH)6 Cyclohexane-1,2,3,4,5,6-hexol Inositol C10H19OH 5-Methyl-2-(propan-2-yl)cyclohexan-1-ol Menthol Applications Total recorded alcohol per capita consumption (15+), in litres of pure ethanol[22]

Alcohols have a long history of myriad uses. For simple mono-alcohols, which is the focus on this article, the following are most important industrial alcohols:[23]

  • methanol, mainly for the production of formaldehyde and as a fuel additive
  • ethanol, mainly for alcoholic beverages, fuel additive, solvent
  • 1-propanol, 1-butanol, and isobutyl alcohol for use as a solvent and precursor to solvents
  • C6–C11 alcohols used for plasticizers, e.g. in polyvinylchloride
  • fatty alcohol (C12–C18), precursors to detergents

Methanol is the most common industrial alcohol, with about 12 million tons/y produced in 1980. The combined capacity of the other alcohols is about the same, distributed roughly equally.[23]

Toxicity Main articles: ethanol and methanol

With respect to acute toxicity, simple alcohols have low acute toxicities. Doses of several milliliters are tolerated. For pentanols, hexanols, octanols and longer alcohols, LD50 range from 2–5 g/kg (rats, oral). Methanol and ethanol are less acutely toxic. All alcohols are mild skin irritants.[23]

The metabolism of methanol (and ethylene glycol) is affected by the presence of ethanol, which has a higher affinity for liver alcohol dehydrogenase. In this way methanol will be excreted intact in urine.[24][25][26]

Physical properties

In general, the hydroxyl group makes alcohols polar. Those groups can form hydrogen bonds to one another and to most other compounds. Owing to the presence of the polar OH alcohols are more water-soluble than simple hydrocarbons. Methanol, ethanol, and propanol are miscible in water. Butanol, with a four-carbon chain, is moderately soluble.

Because of hydrogen bonding, alcohols tend to have higher boiling points than comparable hydrocarbons and ethers. The boiling point of the alcohol ethanol is 78.29 °C, compared to 69 °C for the hydrocarbon hexane, and 34.6 °C for diethyl ether.

Occurrence in nature

Simple alcohols are found widely in nature. Ethanol is most prominent because it is the product of fermentation, a major energy-producing pathway. The other simple alcohols are formed in only trace amounts. More complex alcohols are pervasive, as manifested in sugars, some amino acids, and fatty acids.

Production Ziegler and oxo processes

In the Ziegler process, linear alcohols are produced from ethylene and triethylaluminium followed by oxidation and hydrolysis.[23] An idealized synthesis of 1-octanol is shown:

Al(C2H5)3 + 9 C2H4 → Al(C8H17)3
Al(C8H17)3 + 3 O + 3 H2O → 3 HOC8H17 + Al(OH)3

The process generates a range of alcohols that are separated by distillation.

Many higher alcohols are produced by hydroformylation of alkenes followed by hydrogenation. When applied to a terminal alkene, as is common, one typically obtains a linear alcohol:[23]


Such processes give fatty alcohols, which are useful for detergents.

Hydration reactions

Some low molecular weight alcohols of industrial importance are produced by the addition of water to alkenes. Ethanol, isopropanol, 2-butanol, and tert-butanol are produced by this general method. Two implementations are employed, the direct and indirect methods. The direct method avoids the formation of stable intermediates, typically using acid catalysts. In the indirect method, the alkene is converted to the sulfate ester, which is subsequently hydrolyzed. The direct hydration using ethylene (ethylene hydration)[27] or other alkenes from cracking of fractions of distilled crude oil.

Hydration is also used industrially to produce the diol ethylene glycol from ethylene oxide.

Biological routes

Ethanol is obtained by fermentation using glucose produced from sugar from the hydrolysis of starch, in the presence of yeast and temperature of less than 37 °C to produce ethanol. For instance, such a process might proceed by the conversion of sucrose by the enzyme invertase into glucose and fructose, then the conversion of glucose by the enzyme complex zymase into ethanol (and carbon dioxide).

Several species of the benign bacteria in the intestine use fermentation as a form of anaerobic metabolism. This metabolic reaction produces ethanol as a waste product. Thus, human bodies contain some quantity of alcohol endogenously produced by these bacteria. In rare cases, this can be sufficient to cause "auto-brewery syndrome" in which intoxicating quantities of alcohol are produced.[28][29][30]

Like ethanol, butanol can be produced by fermentation processes. Saccharomyces yeast are known to produce these higher alcohols at temperatures above 75 °F (24 °C). The bacterium Clostridium acetobutylicum can feed on cellulose to produce butanol on an industrial scale.[31]


Primary alkyl halides react with aqueous NaOH or KOH mainly to primary alcohols in nucleophilic aliphatic substitution. (Secondary and especially tertiary alkyl halides will give the elimination (alkene) product instead). Grignard reagents react with carbonyl groups to secondary and tertiary alcohols. Related reactions are the Barbier reaction and the Nozaki-Hiyama reaction.


Aldehydes or ketones are reduced with sodium borohydride or lithium aluminium hydride (after an acidic workup). Another reduction by aluminiumisopropylates is the Meerwein-Ponndorf-Verley reduction. Noyori asymmetric hydrogenation is the asymmetric reduction of β-keto-esters.


Alkenes engage in an acid catalysed hydration reaction using concentrated sulfuric acid as a catalyst that gives usually secondary or tertiary alcohols. The hydroboration-oxidation and oxymercuration-reduction of alkenes are more reliable in organic synthesis. Alkenes react with NBS and water in halohydrin formation reaction. Amines can be converted to diazonium salts, which are then hydrolyzed.

The formation of a secondary alcohol via reduction and hydration is shown:

Reactions Deprotonation

With a pKa of around 16–19, they are, in general, slightly weaker acids than water. With strong bases such as sodium hydride or sodium they form salts called alkoxides, with the general formula RO− M+.

2 R-OH + 2 NaH → 2 R-O−Na+ + 2 H2
2 R-OH + 2 Na → 2 R-O−Na+ + H2

The acidity of alcohols is strongly affected by solvation. In the gas phase, alcohols are more acidic than is water.[32]

Nucleophilic substitution

The OH group is not a good leaving group in nucleophilic substitution reactions, so neutral alcohols do not react in such reactions. However, if the oxygen is first protonated to give R−OH2+, the leaving group (water) is much more stable, and the nucleophilic substitution can take place. For instance, tertiary alcohols react with hydrochloric acid to produce tertiary alkyl halides, where the hydroxyl group is replaced by a chlorine atom by unimolecular nucleophilic substitution. If primary or secondary alcohols are to be reacted with hydrochloric acid, an activator such as zinc chloride is needed. In alternative fashion, the conversion may be performed directly using thionyl chloride.

Alcohols may, likewise, be converted to alkyl bromides using hydrobromic acid or phosphorus tribromide, for example:

3 R-OH + PBr3 → 3 RBr + H3PO3

In the Barton-McCombie deoxygenation an alcohol is deoxygenated to an alkane with tributyltin hydride or a trimethylborane-water complex in a radical substitution reaction.


Meanwhile, the oxygen atom has lone pairs of nonbonded electrons that render it weakly basic in the presence of strong acids such as sulfuric acid. For example, with methanol:

Upon treatment with strong acids, alcohols undergo the E1 elimination reaction to produce alkenes. The reaction, in general, obeys Zaitsev's Rule, which states that the most stable (usually the most substituted) alkene is formed. Tertiary alcohols eliminate easily at just above room temperature, but primary alcohols require a higher temperature.

This is a diagram of acid catalysed dehydration of ethanol to produce ethylene:

A more controlled elimination reaction is the with carbon disulfide and iodomethane.


Alcohol and carboxylic acids react in the so-called Fischer esterification. The reaction usually requires a catalyst, such as concentrated sulfuric acid:

R-OH + R'-CO2H → R'-CO2R + H2O

Other types of ester are prepared in a similar manner – for example, tosyl (tosylate) esters are made by reaction of the alcohol with p-toluenesulfonyl chloride in pyridine.

Oxidation Main article: Alcohol oxidation

Primary alcohols (R-CH2OH) can be oxidized either to aldehydes (R-CHO) or to carboxylic acids (R-CO2H). The oxidation of secondary alcohols (R1R2CH-OH) normally terminates at the ketone (R1R2C=O) stage. Tertiary alcohols (R1R2R3C-OH) are resistant to oxidation.

The direct oxidation of primary alcohols to carboxylic acids normally proceeds via the corresponding aldehyde, which is transformed via an aldehyde hydrate (R-CH(OH)2) by reaction with water before it can be further oxidized to the carboxylic acid.

Mechanism of oxidation of primary alcohols to carboxylic acids via aldehydes and aldehyde hydrates

Reagents useful for the transformation of primary alcohols to aldehydes are normally also suitable for the oxidation of secondary alcohols to ketones. These include Collins reagent and Dess-Martin periodinane. The direct oxidation of primary alcohols to carboxylic acids can be carried out using potassium permanganate or the Jones reagent.

See also
  • Enol
  • Ethanol fuel
  • Fatty alcohol
  • Index of alcohol-related articles
  • Polyol
  • Rubbing alcohol
  • Sugar alcohol
  • Transesterification
  • Viktor Meyer test
  • Lucas test
  1. ^ "alcohols". IUPAC Gold Book. Retrieved 16 December 2013..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
  2. ^ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "Alcohols". doi:10.1351/goldbook.A00204
  3. ^ Dhawendra Kumar (11 May 2012). Genomics and Health in the Developing World. Oxford University Press. p. 1128. ISBN 9780199705474.
  4. ^ Al-Hassani, Salim; Abattouy, Mohammed. "The Advent of Scientific Chemistry". Muslim Heritage. Retrieved 17 May 2018.
  5. ^ Curzon, George Nathaniel (7 July 2010). "The History of Alcohol in Islam". Coming Anarchy. Retrieved 17 May 2018.
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  7. ^ Multhauf, Robert (1966). The Origins of Chemistry. London. pp. 204–6.
  8. ^ Hill, Donald Routledge (1993). Islamic science and engineering. Edinburgh University Press. ISBN 9780748604555.
  9. ^ Hitti, Philip K. (1977). History of the Arabs from the earliest times to the present (10th ed.). London: Macmillan Publishers. p. 365. ISBN 978-0-333-09871-4. The most notable medical authors who followed the epoch of the great translators were Persian in nationality but Arab in language: 'Ali al-Tabari, al-Razi, 'Ali ibn-al-'Abbas al-Majusi and ibn-Sina.
  10. ^ Modanlou, Houchang D. (November 2008). "A tribute to Zakariya Razi (865 - 925 AD), an Iranian pioneer scholar" (PDF). Archives of Iranian Medicine. 11 (6): 673–677. PMID 18976043. Retrieved 17 May 2018. Abu Bakr Mohammad Ibn Zakariya al-Razi, known in the West as Rhazes, was born in 865 AD in the ancient city of Rey, Near Tehran. A musician during his youth he became an alchemist. He discovered alcohol and sulfuric acid. He classified substances as plants, organic, and inorganic.
  11. ^ Schlosser, Stefan (May 2011). "Distillation – from Bronze Age till today". Retrieved 17 May 2018. Al-Razi (865–925) was the preeminent Pharmacist and physician of his time . The discovery of alcohol, first to produce acids such as sulfuric acid, writing up extensive notes on diseases such as smallpox and chickenpox, a pioneer in ophthalmology, author of first book on pediatrics, making leading contributions in inorganic and organic chemistry, also the author of several philosophical works.
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External links Alcoholat Wikipedia's sister projects
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  • Alcohol (Ethanol) at The Periodic Table of Videos (University of Nottingham)
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alcohols (1°)
  • Methanol (C
  • Ethanol (C
  • 1-Propanol (C
  • n-Butanol (C
  • 1-Pentanol (C
  • 1-Hexanol (C
  • 1-Heptanol (C
  • 1-Octanol (C
  • 1-Nonanol (C
  • 1-Decanol (C
  • Undecanol (C
  • Dodecanol (C
  • Tridecan-1-ol (C
  • 1-Tetradecanol (C
  • Pentadecan-1-ol (C
  • Cetyl alcohol (C
  • Heptadecan-1-ol (C
  • Stearyl alcohol (C
  • Nonadecan-1-ol (C
  • Arachidyl alcohol (C
  • Heneicosan-1-ol (C
  • Docosanol (C
  • Tricosan-1-ol (C
  • 1-Tetracosanol (C
  • Pentacosan-1-ol (C
  • 1-Hexacosanol (C
  • 1-Heptacosanol (C
  • 1-Octacosanol (C
  • 1-Nonacosanol (C
  • Triacontanol (C
Other primary
  • Isobutanol (C
  • Isoamyl alcohol (C
  • 2-Methyl-1-butanol (C
  • Phenethyl alcohol (C
  • Tryptophol (C
alcohols (2°)
  • Isopropanol (C
  • 2-Butanol (C
  • 2-Pentanol (C
  • 2-Hexanol (C
  • Pinacolyl alcohol (C
  • 2-Heptanol (C
  • Cyclohexanol (C
  • 2-Octanol (C
alcohols (3°)
  • tert-Butyl alcohol (C
  • tert-Amyl alcohol (C
  • 2-Methyl-2-pentanol (C
  • 2-Methylhexan-2-ol (C
  • 2-Methylheptan-2-ol (C
  • 3-Methyl-3-pentanol (C
  • 3-Methyloctan-3-ol (C
  • Category
  • v
  • t
  • e
Alcohol-related topics by countryCountries
  • Afghanistan
  • Australia
  • Bangladesh
  • Indonesia
  • Iran
  • Malaysia
  • New Zealand
  • Sudan
  • Australia
  • Korea
  • Canada
  • China
  • Sweden
  • Australia
  • Canada
  • Iceland
  • India
    • Prohibition
  • Germany
  • Russia
    • Consumption
  • United Kingdom
  • United States
    • Youth consumption
  • v
  • t
  • e
Functional groupsOnly carbon,
and oxygenHydrocarbons
  • Allene
  • Alkene (Allyl, Vinyl)
  • Alkyl (Methyl, Ethyl, Propyl, Butyl, Pentyl)
  • Alkyne
  • Benzyl
  • Carbene
  • Cumulene
  • Methylene bridge
  • Methylene group
  • Methine
  • Phenyl
  • Acetoxy
  • Acetyl
  • Acryloyl
  • Acyl
  • Aldehyde
  • Alkoxy (Methoxy)
  • Benzoyl
  • Carbonyl
  • Carboxyl
  • Carboxylic anhydride
  • Dioxirane
  • Epoxide
  • Ester
  • Ether
  • Ethylenedioxy
  • Hydroxy
  • Ketone
  • Methylenedioxy
  • Peroxide (Organic)
  • Ynone
Only one
apart from
C, H, ONitrogen
  • Amine
  • Azo compound
  • Cyanate
  • Hydrazone
  • Imide
  • Imine
  • Isocyanate
  • Isonitrile
  • Nitrene
  • Nitrile
  • Nitro compound
  • Nitroso compound
  • Organic amide
  • Oxime
  • Phosphonate
  • Phosphonous
  • Disulfide
  • Sulfone
  • Sulfonic acid
  • Sulfoxide
  • Thial
  • Thioester
  • Thioether
  • Thioketone
  • Thiol
  • Selenol
  • Selenonic acid
  • Seleninic acid
  • Selenenic acid
  • Selone
  • Tellurol
  • Telluroketone
  • Isothiocyanate
  • Phosphoramide
  • Sulfenyl chloride
  • Sulfonamide
  • Thiocyanate
See also chemical classification, chemical nomenclature (inorganic, organic)
  • v
  • t
  • e
  • Alcohol
  • Algae fuel
  • Bagasse
  • Babassu oil
  • Biobutanol
  • Biodiesel
  • Biogas
  • Biogasoline
  • Bioliquids
  • Corn stover
  • Ethanol
    • cellulosic
    • mixtures
  • Methanol
  • Stover
    • Corn stover
  • Straw
  • Cooking oil
    • Vegetable oil fuel
  • Water hyacinth
  • Wood gas
Energy from
  • Barley
  • Cassava
  • Coconut oil
  • Grape
  • Hemp
  • Maize
  • Oat
  • Palm oil
  • Potato
  • Rapeseed
  • Rice
  • Sorghum bicolor
  • Soybean
  • Sugarcane
  • Sugar beet
  • Sunflower
  • Wheat
  • Yam
  • Camelina sativa
energy crops
  • Arundo
  • Big bluestem
  • Camelina
  • Chinese tallow
  • Duckweed
  • Jatropha curcas
  • Millettia pinnata
  • Miscanthus giganteus
  • Switchgrass
  • Salicornia
  • Wood fuel
  • Bioconversion
  • Biomass heating systems
  • Biorefinery
  • Fischer–Tropsch process
  • Industrial biotechnology
  • Pellets
    • mill
    • stove
  • Thermal depolymerization
  • Cellulosic ethanol commercialization
  • Energy content of biofuel
  • Energy crop
  • Energy forestry
  • Food vs. fuel
  • Issues
  • Sustainable biofuel
  • v
  • t
  • e
Alternative fuel vehiclesCompressed-air engine
  • Compressed air car
  • Compressed-air vehicle
  • Tesla turbine
Electric motor
  • Battery-electric locomotive
  • Battery electric vehicle
  • Cater MetroTrolley
  • Electric aircraft
  • Electric bicycle
  • Pedelec
  • Electric boat
  • Electric bus
    • Battery electric bus
  • Electric car
    • List
  • Electric truck
  • Electric platform truck
  • Electric vehicle
  • Electric motorcycles and scooters
  • Electric kick scooter
  • Gyro flywheel locomotive
  • Hybrid electric vehicle
  • Hybrid train
  • Motorized bicycle
  • Neighborhood Electric Vehicle
  • Plug-in electric vehicle
    • List
  • Plug-in hybrid electric vehicle
  • Solar vehicle
    • Solar car
    • Solar bus
Biofuel ICE
  • Alcohol fuel
  • Biodiesel
  • Biogas
  • Butanol fuel
  • Common ethanol fuel mixtures
  • E85
  • Ethanol fuel
  • Flexible-fuel vehicle
  • Methanol economy
  • Methanol fuel
  • Wood gas
  • Fuel cell vehicle
  • Hydrogen economy
  • Hydrogen vehicle
  • Hydrogen internal combustion engine vehicle
  • Autogas
  • Hybrid electric vehicle
  • Liquid nitrogen vehicle
  • Natural gas vehicle
  • Propane
  • Steam car
  • Bi-fuel vehicle
  • Flexible-fuel vehicle
  • Hybrid vehicle
  • Multifuel
  • Plug-in hybrid
  • Who Killed the Electric Car?
  • What Is the Electric Car?
  • Revenge of the Electric Car
See also
  • Wind-powered vehicle
  • Zero-emissions vehicle
Authority control
  • GND: 4141899-2
  • LCCN: sh85003314
  • NARA: 10640163
  • NDL: 00560350



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