[chiralSPO]

This
"Since alcohols and phenols can be alkylated to alkyl ethers, could the vapor phase alkylation of hydrocarbons yield a alkene? "
is like asking "since wood can be made into tables, would burning oil make smoke?"

"since wood can be made into tables"
Well, OK it can.
"would burning oil make smoke?"
well, it might, but it has nothing to do with the first bit.

"Since alcohols and phenols can be alkylated to alkyl ethers,"
Well OK they can
"could the vapor phase alkylation of hydrocarbons yield a alkene? "
Yes, it can (as long as the hydrocarbon you started with was an alkene, but even that doesn't guarantee it)
 but it has nothing to do with the first bit.

amen!

"Is methylcyclohexane an alkylaromatic (saturated) hydrocarbon ?"
It is impossible for an aromatic hydrocarbon to be saturated.

For the record, methylcyclohexane is a saturated (unless you count the ring as an unsaturation). It is not aromatic, and, as pointed out by Bored, aromatic hydrocarbons and saturated hydrocarbons are exclusive groups. One must be either or neither, but cannot be both.

[smart (OP)]

Is it possible to convert long-chains alcohols (aromatics) to an electrophilic alkene ??

 

[chiralSPO]

long chain alcohols are also NOT aromatics

[smart (OP)]

long chain alcohols are also NOT aromatics

Then, what is a alkyl aromatic hydrocarbon?

[chiralSPO]

long chain alcohols are also NOT aromatics

Then, what is a alkyl aromatic hydrocarbon?

I have never heard the term before, but presumably it would be intended to mean hydrocarbons that contain both aromatic and aliphatic components. For instance, toluene, ethylbenzene, xylenes, mesitylene, tri-tert-butyl benzene, 2-octylnaphthalene etc.

some definitions:

hydrocarbon--a compound that is composed only of hydrogen and carbon (so no ethers, alcohols, esters amines etc.)

aliphatic (alkyl): part of a molecule composed of one or more tetrahedral (sp3-hybridized) carbons connected together as a chain, branched chain, ring, multiple rings, or combination of rings and chains.

aromatic (aryl): part of a molecule composed of at least 3 trigonal (sp2-hybridized) carbons connected together as a ring or multiple rings such that the pi system has 4n+2 electrons in it.

[Bored chemist]

Is it possible to convert long-chains alcohols (aromatics) to an electrophilic alkene ??

https://www.khanacademy.org/science/organic-chemistry

[smart (OP)]

long chain alcohols are also NOT aromatics

Then, what is a alkyl aromatic hydrocarbon?

I have never heard the term before, but presumably it would be intended to mean hydrocarbons that contain both aromatic and aliphatic components. For instance, toluene, ethylbenzene, xylenes, mesitylene, tri-tert-butyl benzene, 2-octylnaphthalene etc.

Thanks for this info.

1) So does a zeolite-based catalytic vapor-phase alkylation of benzene (alkyl) produce ethylbenzene ?
2) What chemical reaction can possibly yield "alkyl polycyclic aromatic hydrocarbons" in the atmosphere?
 
3) Can you explain what is a (aluminium) halide ?

Thx.

[chiralSPO]

Thanks for this info.

1) So does a zeolite-based catalytic vapor-phase alkylation of benzene (alkyl) produce ethylbenzene ?
2) What chemical reaction can possibly yield "alkyl polycyclic aromatic hydrocarbons" in the atmosphere?
 
3) Can you explain what is a (aluminium) halide ?

Thx.

You're welcome.

1) Yes, it is possible for zeolites to catalyze the formation of ethylbenzene and related compounds from benzene and sources of alkayl substituents.

2) I am not entirely sure about the alkyl part, but certainly incomplete combustion of hydrocarbons is known to produce polycyclic aromatic hydrocarbons.

3) a halide is any halogen (fluorine, chlorine, bromine or iodine) with a charge of negative one (fluoride, chloride, bromide or iodide). So an example of an aluminum halide is aluminum chloride. While aluminum halides might be important for the synthesis of zeolite catalysts (I assume this is where the question comes from), it is important to note that catalysts are not consumed during the course of the reaction, so it is unlikely that the products of zeolite catalysis contain any significant amount of zeolite or zeolite components, especially if the products are then going to be fed into a jet engine (if there were any aluminum compounds in jet fuel, it would almost certainly form aluminum oxide junk inside the jet engine, and ruin the engine after only a short period of use, which would like be very expensive, if not dangerous to those in an under the aircraft)