Geometric vs Constitutional Isomers  [ENDORSED]

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Geometric vs Constitutional Isomers

Postby Kyle_Nakahira_1B » Sun Mar 05, 2017 11:29 pm

What is the difference between a geometric isomer and a constitutional isomer?

Celina N 2H
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Re: Geometric vs Constitutional Isomers

Postby Celina N 2H » Mon Mar 06, 2017 9:48 am

Constitutional isomers have atoms that vary in the order in which they are connected in; therefore, constitutional isomers may contain differing bonding patterns or functional groups.

Geometric isomers are based on geometric configuration; they can vary in position around bonds with restricted rotation (i.e., any bonds that are not single bonds) or throughout a ring geometry.

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Re: Geometric vs Constitutional Isomers  [ENDORSED]

Postby Michelle_Li_1H » Mon Mar 06, 2017 10:10 am

To add on, both constitutional isomers and geometric isomers have the same molecular formula. However, constitutional formulas have different connectivity such that they can be drawn differently. Geometric isomers on the other hand have the same connectivity but different arrangements in space which would mean different structures and compounds.

Examples of constitutional isomers would be the three different structures of C5H12, while geometric isomers for 2-pentene (C5H10) would be trans-2-pentene and cis-2-pentene.

The OChem textbook discusses this in more detail on pages 10 and 14.

Hope this helps!

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