Question

Draw all the stereo-isomers of the following compounds and assign (R)
or (S) configuration.
2,4-dibromopentane

Answer 1

Draw all the stereo-isomers of the following compounds and assign (R) or (S) configuration:

2,4-dibromopentane

Solution:

The molecule of 2,4-dibromopentane (see below) has two chiral centers (marked with asterisk), so it could have 3 possible stereoisomers.

(2S,4S)-2,4-dibromopentane

Second stereoisomer:

(2R,4R)-2,4-dibromopentane

Third stereoisomer (also called meso-2,4-dibromopentane):

(2R,4S)-2,4-dibromopentane

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