"Simple aromatic hydrocarbons come from two main sources: coal and petroleum. Coal is an enormously complex mixture made up primarily of large arrays of benzene-like rings joined together. Thermal breakdown of coal occurs when it is heated to 1000 °C in the absence of air, and a mixture of volatile products called coal tar boils off. Fractional distillation of coal tar yields benzene, toluene, xylene (dimethylbenzene), naphthalene, and a host of other aromatic compounds. Unlike coal, petroleum contains few aromatic compounds and consists largely of alkanes. (...) During petroleum refining, however, aromatic molecules are formed when alkanes are passed over a catalyst at about 500 °C under high pressure."
Quote Details
Added by wikiquote-import-bot
Unverified quote
0 likes
Original Language: English
Available Languages (1)
Sources
John McMurry, Organic Chemistry 8th ed. (2012), Ch. 15. Benzene and Aromaticity
https://en.wikiquote.org/wiki/Aromaticity
Revision History
No revisions have been submitted for this quote.
Categories
Aromaticity
1 quote on TrueQuotesView all quotes by Aromaticity →
Related Quotes
"The question of a possible physiological significance, in the resemblance between the action of choline esters and th…"
"The α-hydrogens of nitroalkanes are appreciably acidic due to resonance stabilization of the anion … The anions deriv…"
"The different arrangements of atoms that result from bond rotation are called conformations, and molecules that have …"
"Molecules that differ from each other by rotation about single bonds are called conformational isomers or conformers.…"
"The preferred conformations of 2-bromo- and 2-chlorocyclohexanones depend on the polarity of the solvent. In the dieq…"
"Theoretical and computational chemistry contribute greatly to our understanding of conformational preferences of both…"
"The effect of conformation on reactivity is intimately associated with the details of the mechanism of a reaction. ..…"
"To measure the amount of strain in a compound, we have to measure the total energy of the compound and then subtract …"
"Cyclopropane is the most strained of all rings, primarily because of the angle strain caused by its 60°C C-C bond ang…"
"When speaking of an atom’s ability to polarize a bond, we often use the term inductive effect. An inductive effect is…"