How do E and Z isomers arise in molecules?

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anor277 Share
Dec 13, 2016

Answer:

Structural isomerism derives from different connectivity for a given formula.

Explanation:

Geometric isomerism presumes the SAME structural isomerism, i.e. the same connectivity, however different geometry for the same structure. Organic chemistry provides rich examples of structural and geometric isomerism, and #E, Z# or #"cis/trans"# isomerism provides many instances.

Consider #"2-butylene"#, #H_3C-CH=CH-CH_3#; this is a simple organic structure that can nevertheless generate 2 geometric isomers as shown.

See here

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For both isomers, connectivity IS THE SAME. #C1# connects to #C2# to #C3# to #C4#. Nevertheless, because of the different geometry, the isomeric butenes have different structures, and chemical properties.

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