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Hexamethylbenzene, also known as mellitene, is a hydrocarbon with the molecular formula C 12 H 18 and the condensed structural formula C 6 (CH 3) 6. It is an aromatic compound and a derivative of benzene , where benzene's six hydrogen atoms have each been replaced by a methyl group .
For the hydrocarbons with no further unsaturation, there are four isomers. The chemical formula for all the saturated isomers is C 9 H 12 . There are three trimethylbenzenes , three ethylmetylbenzenes, and two propylbenzene isomers. 1980s American gasoline contained about 3-4% C 3 -benzenes.
Alkylbenzene isomers can be differentiated by observing the position of alkyl substituents on the benzene ring using chemical ionization-proton exchange mass spectrometry. Conventional GC-MS yields limited results because the isomers have identical molecular weight and substituents.
It is one of the three isomers of trimethylbenzene. It is used in jet fuel, mixed with other hydrocarbons , to prevent the formation of solid particles which might damage the engine. German chemist Oscar Jacobsen [ de ] first prepared the hydrocarbon in 1882 and designated it hemellitol as a reference to the trivial name of hexamethylbenzene ...
[1] [2] Through their different arrangement, they form three structural isomers with the molecular formula C 9 H 12. They also belong to the group of C 3-benzenes. The best-known isomer is mesitylene. [3]
In one isomer the CO ligands are terminal. When a pair of CO are bridging, cis and trans isomers are possible depending on the location of the C 5 H 5 groups. [7] Another example in organometallic chemistry is the linkage isomerization of decaphenylferrocene, [(η 5-C 5 Ph 5) 2 Fe]. [8] [9] Formation of decaphenylferrocene from its linkage isomer
Social Security serves as a lifeline for tens of millions of seniors. Today, that number is growing. As of December 2024, the Social Security Administration (SSA) reported that about 65.5 million...
Atropisomers are conformational isomers which can be separated due to restricted rotation. [18] The equilibrium between conformational isomers can be observed using a variety of spectroscopic techniques. [19] Protein folding also generates conformers which can be observed.