Question

Each of the following descriptions applies to more than one alkane. In each case draw and name two structures that match the description.

(a)$\text{an\hspace{0.17em}\hspace{0.17em}isopropylheptane}$

(b)$\text{a\hspace{0.17em}diethyldecane}$

(c)$\text{a}cis-\text{diethylcyclohexane}$

(d)$\text{a}trans-\text{dihalocyclopentane}$

(e)$\text{a(2,3-dimethylpentyl)cycloalkane}$

(f)$\text{a\hspace{0.17em}\hspace{0.17em}bicyclononane}$

Short answer

(a)

(b)

(c)

(d)

(e)

(f)

Step-by-step solution

Cis and transisomers

Cis and transisomerism can be used only for the compounds in which two doubly bonded carbon atoms have similar atoms or groups. When similar atoms or groups lie on the same side, it is called a cis-isomer, and when similar atoms or groups lie on the opposite sides, it is called a trans-isomer. These two geometric isomers cannot interconvert without breaking and forming the bonds again

Alkanes

Alkanes are hydrocarbon containing only single bonds. The general formula for analkane is ,where number of carbon atoms.

Dr

(a) The structures matching the description are $\text{2,3-dimethyloctane}$and $\text{3-ethyl-2-methylheptane}$.