Question

provide the structural formulas for the following organic compounds:
a) 2,3 - dimethylbut - 2 - ene
b) 1 - bromo - 2 - iodo - cyclopentane

Explanation:

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

The parent chain has 4 carbon atoms (but -) with a double bond at the 2 - position ( - 2 - ene) and two methyl groups at the 2 and 3 positions. 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 atom at the 1 - position and an iodine atom at the 2 - position. The structural formula can be drawn as a cyclopentane ring with a Br attached to one carbon and an I attached to an adjacent carbon.

Answer:

a) $CH_3C(CH_3)=C(CH_3)CH_3$
b) Cyclopentane ring with Br at C - 1 and I at C - 2.