Question

sch 4u
name:
alkanes, alkenes, alkynes, benzene, halides

1. provide the structural formulas for the following organic compounds:

a) 2,3 - dimethylbut - 2 - ene
b) 1 - bromo - 2 - iodo - cyclopenta

Explanation:

Step1: Analyze 2,3 - dimethylbut - 2 - ene

The parent chain is but - 2 - ene, which has 4 carbon atoms with a double bond between the second and third carbon. There are two methyl ($-CH_3$) groups, one on the second and one on the third carbon. The structural formula is $CH_3C(CH_3)=C(CH_3)CH_3$.

Step2: Analyze 1 - bromo - 2 - iodo - cyclopentane

The parent structure is cyclopentane, a 5 - membered ring. There is a bromine ($-Br$) atom attached to the first carbon and an iodine ($-I$) atom attached to the second carbon. The structural formula can be represented as a 5 - membered ring with $-Br$ on one carbon and $-I$ on an adjacent carbon.

Answer:

a) $CH_3C(CH_3)=C(CH_3)CH_3$
b) A 5 - membered ring with $-Br$ on one carbon and $-I$ on an adjacent carbon.