C2-Benzenes

The C2benzenes are a class of organic aromatic compounds which contain a benzene ring and two other carbon atoms. For the hydrocarbons with no further unsaturation, there are four isomers. There are three xylenes and one ethylbenzene. The substances are:

## Xylenes

* o-xylene (1,2-dimethylbenzene),
* m-xylene (1,3-dimethylbenzene)
* p-xylene (1,4-dimethylbenzene)

## Other

* Ethylbenzene (not a true xylene but present in mixtures called "mixed xylenes")
* Styrene
* Phenylacetylene

* 1,2-Dimethylbenzene

* 1,3-Dimethylbenzene

* 1,4-Dimethylbenzene

* Ethylbenzene

* Styrene

* Phenylacetylene

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Hydrocarbons

Saturated
aliphatic
hydrocarbons|

| Alkanes
CnH2n \+ 2|

| Linear alkanes|

* Methane
* Ethane
* Propane
* Butane
* Pentane
* Hexane
* Heptane
* Octane
* Nonane
* Decane

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Branched alkanes|

* Isobutane
* Isopentane
* 3-Methylpentane
* Neopentane
* Isohexane
* Isoheptane
* Isooctane
* Isononane
* Isodecane

Cycloalkanes|

* Cyclopropane
* Cyclobutane
* Cyclopentane
* Cyclohexane
* Cycloheptane
* Cyclooctane
* Cyclononane
* Cyclodecane

Alkylcycloalkanes|

* Methylcyclopropane
* Methylcyclobutane
* Methylcyclopentane
* Methylcyclohexane
* Isopropylcyclohexane

Bicycloalkanes|

* Housane (bicyclo[2.1.0]pentane)
* Norbornane (bicyclo[2.2.1]heptane)
* Decalin (bicyclo[4.4.0]decane)

Polycycloalkanes|

* Adamantane
* Diamondoid
* Perhydrophenanthrene
* Sterane
* Cubane
* Prismane
* Dodecahedrane
* Basketane
* Churchane
* Pagodane
* Twistane

Other|

* Spiroalkanes

Unsaturated
aliphatic
hydrocarbons|

| Alkenes
CnH2n|

| Linear alkenes|

* Ethene
* Propene
* Butene
* Pentene
* Hexene
* Heptene
* Octene
* Nonene
* Decene

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Branched alkenes|

* Isobutene
* Isopentene
* Isohexene
* Isoheptene
* Isooctene
* Isononene
* Isodecene

Alkynes
CnH2n − 2|

| Linear alkynes|

* Ethyne
* Propyne
* Butyne
* Pentyne
* Hexyne
* Heptyne
* Octyne
* Nonyne
* Decyne

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Branched alkynes|

* Isopentyne
* Isohexyne
* Isoheptyne
* Isooctyne
* Isononyne
* Isodecyne

Cycloalkenes|

* Cyclopropene
* Cyclobutene
* Cyclopentene
* Cyclohexene
* Cycloheptene
* Cyclooctene
* Cyclononene
* Cyclodecene

Alkylcycloalkenes|

* Methylcyclopropene
* Methylcyclobutene
* Methylcyclopentene
* Methylcyclohexene
* Isopropylcyclohexene

Bicycloalkenes|

* Norbornene

Cycloalkynes|

* Cyclopropyne
* Cyclobutyne
* Cyclopentyne
* Cyclohexyne
* Cycloheptyne
* Cycloctyne
* Cyclononyne
* Cyclodecyne

Dienes|

* Propadiene
* Butadiene
* Pentadiene
* Hexadiene
* Heptadiene
* Octadiene
* Nonadiene
* Decadiene

Other|

* Alkatriene
* Alkadiyne
* Cumulene
* Cyclooctatetraene
* Cyclododecatriene
* Enyne

Aromatic
hydrocarbons|

| PAHs|

| Acenes|

* Naphthalene
* Anthracene
* Tetracene
* Pentacene
* Hexacene
* Heptacene

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Other|

* Azulene
* Fluorene
* Helicenes
* Circulenes
* Butalene
* Phenanthrene
* Chrysene
* Pyrene
* Corannulene
* Kekulene

Alkylbenzenes|

* Toluene
* Xylene
* Ethylbenzene
* Cumene
* Styrene
* Mesitylene
* Pseudocumene
* Hemellitene
* Cymene
* Hexamethylbenzene

Other|

* Benzene
* Cyclopropenylidene

Other|

* Annulenes
* Annulynes
* Alicyclic compounds
* Petroleum jelly

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