What are meso isomers?

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What are meso isomers?

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Answer 1 · 2018-07-03T05:04:11

A $meso isomer$ $"meso isomer"$ is a symmetric $RS$ $"RS"$ speices such that....

Explanation:

A $meso isomer$ $"meso isomer"$ is a symmetric $RS$ $"RS"$ molecule such that inversion in a mirror plane results in the same molecule.

And this is best illustrated by an example...

$H_{3} C - * C H (O H) C H_{2} * C H (O H) C H_{3}$ $H_3C-stackrel"*"CH(OH)CH_2stackrel"*"CH(OH)CH_3$ ...

The potentially chiral carbons are marked with a $*$ $"*"$ . While $RR$ $"RR"$ and $SS$ $"SS"$ are indeed enantiomeric, $RS$ $"RS"$ is EQUIVALENT to $SR$ $"SR"$ by the internal mirror plane. And so the simple answer is that a meso compound is a symmetric $RS$ $"RS"$ diastereomer...

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What are meso isomers?

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