C4-Benzenes

'''p-Cymene' is a naturally occurring aromatic organic compound. It is classified as an alkylbenzene related to monocyclic monoterpenes. Its structure consists of a benzene ring para-substituted with a methyl group and an isopropyl group. p''-Cymene is insoluble in water, but miscible with organic solvents.

Durene, or 1,2,4,5-tetramethylbenzene, is an organic compound with the formula C6H2(CH3)4. It is a colourless solid with a sweet odor. The compound is classified as an alkylbenzene. It is one of three isomers of tetramethylbenzene, the other two being prehnitene (1,2,3,4-tetramethylbenzene) and isodurene (1,2,3,5-tetramethylbenzene). Durene has an unusually high melting point (79.2 °C), reflecting its high molecular symmetry.

Divinylbenzene (DVB) is an organic compound with the chemical formula and structure (a benzene ring with two vinyl groups as substituents). It is related to styrene (vinylbenzene, ) by the addition of a second vinyl group. It is a colorless liquid manufactured by the thermal dehydrogenation of isomeric diethylbenzenes. Under synthesis conditions, o-divinylbenzene converts to naphthalene and thus is not a component of the usual mixtures of DVB.

Prehnitene or 1,2,3,4-tetramethylbenzene is an organic compound with the formula C6H2(CH3)4, classified as an aromatic hydrocarbon. It is a flammable colorless liquid which is nearly insoluble in water but soluble in organic solvents. It occurs naturally in coal tar. Prehnitene is one of three isomers of tetramethylbenzene, the other two being isodurene (1,2,3,5-tetramethylbenzene) and durene (1,2,4,5-tetramethylbenzene). It is a relatively easily oxidized benzene derivative, with E1/2 of 2.0 V vs NHE.

Cymene describes organic compounds with the formula . Three isomers exist: 1,2- 1,3-, and 1,4-. All are colorless liquids, immiscible in water, with similar boiling points. They are classified as aromatic hydrocarbons. They bear two substituents: an isopropyl () group and a methyl group. {|class="wikitable" style="text-align:center; font-size:90%" | colspan="4" class="colspan="4"" | Cymenes |- ! Name | o-Cymene || m-Cymene || p-Cymene |- ! Structural formula | 110px || 110px || 90px |- ! CAS number | 527-84-4 || 535-77-3 || 99–87–6 |- ! melting point (°C) | −71.54 || −63.75 || −67.94

The tetramethylbenzenes constitute a group of substances of aromatic hydrocarbons, which structure consists of a benzene ring with four methyl groups (–CH3) as a substituent. Through their different arrangement, they form three structural isomers with the molecular formula C10H14. They also belong to the group of C4-benzenes. The best-known isomer is durene.

'''n-Butylbenzene' is the organic compound with the formula C6H5C4H9. Of two isomers of butylbenzene, n''-butylbenzene consists of a phenyl group attached to the 1 position of a butyl group. It is a slightly greasy, colorless liquid.

Isodurene or 1,2,3,5-tetramethylbenzene is an organic compound with the formula C6H2(CH3)4, classified as an aromatic hydrocarbon. It is a flammable colorless liquid which is nearly insoluble in water but soluble in organic solvents. It occurs naturally in coal tar. Isodurene is one of three isomers of tetramethylbenzene, the other two being prehnitene (1,2,3,4-tetramethylbenzene) and durene (1,2,4,5-tetramethylbenzene).

'''tert-Butylbenzene' is an organic compound classified as an aromatic hydrocarbon. Its structure consists of a benzene ring substituted with a tert''-butyl group. It is a flammable colorless liquid which is nearly insoluble in water but miscible with organic solvents.

Isobutylbenzene is a chemical compound with the molecular formula C10H14. It is used in chemical synthesis as a fuel and in pharmaceuticals. For instance, it is used to make pain killers like ibuprofen.

'''sec-Butylbenzene' is an organic compound classified as an aromatic hydrocarbon. Its structure consists of a benzene ring substituted with a sec''-butyl group. It is a flammable colorless liquid which is nearly insoluble in water but miscible with organic solvents.