Question

Give the structure for each of the following aromatic hydrocarbons.

a. o-ethyltoluene

b. p-di-tert-butylbenzene

c. m-diethylbenzene

d. 1-phenyl-2-butene.

Short answer

a.

b.

c.

d.

Step-by-step solution

Definition of the Hydrocarbons.

Organic compounds known as hydrocarbons are made entirely of the atoms of hydrogen and carbon. Typically, hydrocarbons are colorless gases with a slight aroma. Alkanes, alkenes, alkynes, and aromatic hydrocarbons are the four subclasses of hydrocarbons.

The structures of alkanes, alkenes, alkynes, and aromatic hydrocarbons are straightforward or fairly complicated.

Studying hydrocarbons can provide insight into the chemistry and production of other functional groups.

Subpart (a) Structure of e-ethyltoluene

In the given aromatic hydrocarbons, the root name is deducedasthe benzene ring with a methyl group attached is presented as toluene (methylbenzene).

The "ethyl" prefix, which denotes the presence of an ethyl group connected to the molecule, is the next prefix that may be recognized as the prefix O-(ortho-) before the given name indicates the proximity of these substituents.

Therefore, the structure of e-ethyltoluene is:

Subpart (b) Structure of pi-di-tert-butylbenzene

In the given thearomatic hydrocarbons name, the root name is "butylbenzene".

Here, the benzene ring will be provided with two tert-butyl groups linked to it.

Next, the prefix "butyl," shows that the molecule has two butyl groups connected to it.

These substituents are now located on the opposite sides of the benzene ring, as indicated by the p-(para-) before the given name.

Therefore, the structure of pi-di-tert-butylbenzene is:

Subpart (c) Structure of m-diethylbenzene

In the given aromatic hydrocarbon, "benzene" is the root name.

The conclusion drawn is that a benzene ring is provided with two ethyl groups linked to it.

The "ethyl" prefix, which denotes the presence of two ethyl groups connected to the molecule, is the next prefix that may be recognized.

The m-(meta-) prefix before the provided name now informs us that these substituents are positioned on the benzene ring with one free carbon in between them.

Therefore, the structure of m-diethylbenzene is:

Subpart (d) Structure of 1-phenyl-2-butene

In the given aromatic hydrocarbon, "butene" is the root name. This deduces that a butene chain with the prefix "phenyl" will be provided.

The number "1-" that appears before the prefix lets us know where the substituent (the benzene ring) is located.

The second carbon atom in the butene chain has a double bond, as indicated by the number 2-before-the-butene.

Therefore, the structure of 1-phenyl-2-butene is: