How many constitutional isomers are possible for C4H9Br?

1 Answer
Nov 23, 2015

I count four constitutional isomers of #"C"_4"H"_9"Br"#.

Explanation:

First draw all the constitutional isomers of #"C"_4"H"_10#. You get

Butane
(from hardinars.tk)

and

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Then put a #"Br"# atom in every possible location on each of the carbon skeletons.

From the straight-chain isomer, we get

1-Bromobutane

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and

2-Bromobutane

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From the branched-chain isomer, we get

1-Bromo-2-methylpropane

o.quizlet.com

and

2-Bromo-2-methylpropane

www.chemsynthesis.com

And there are your four constitutional isomers of #"C"_4"H"_9"Br"#.