24.8 cyclic and aromatic hydrocarbons

Question 1

Cyclic hydrocarbons

Answer 1

Compounds that contain a hydrocarbon ring (ends connect to make a ring)

In the regular ‘anes’ with a ring arrangement are called cycloalkanes will put ‘cyclo’ in the beginning ie cyclopentane cyclooctane

Question 2

Aliphatic compounds

Answer 2

Any hydrocarbon compound that does not have rings

Question 3

arene

Answer 3

A special group of unsaturated cyclic hydrocarbons that benzene is a form of.

Question 4

aromatic compound

Answer 4

a hydrocarbon compound that has a carbon ring and only one hydrogen attached to each. The other bonds are carbon-carbon. Benzene is an aromatic compound with 6 carbons (cyclohexene)

Question 5

resonance

Answer 5

a term used to describe when a molecule has more than one valid drawable structure.
These molecules are more stable than similar molecules without resonance.

To describe resonance, one may draw an inscribed circle.

Question 6

Benzene naming

Answer 6

Benzene can have branches like any other hydrocarbon, in which case you treat it normally; methylbenzene ethylbenzene. If the benzene is a branch itself however, the prefix Phenyl is used; 3-phenylhexane

Question 7

disubstituted benzenes

Answer 7

When benzenes have more than one branch, one starts the address with the first branch. There is no actual beginning or end to a carbon ring. 1,3-dimethylbenzene has one space between the two branches.

Question 8

cracking

Answer 8

a controlled process by which hydrocarbons are broken down or rearranged into smaller, more useful molecules. This is to obtain useful fuels such as gasoline.