Home » Ask & Discuss » Chemistry. » Organic Chemistry « Back to Discussion

Organic Chemistry

New kid on the Block

Joined:	4 Jul 2008
Post:	10

4 Jul 2008 22:24:36 IST

0 People liked this

237

Geo metric isomerism

None

Dear sir ,

I would like to know details about geometric isomerism

Thank you

Yours faithfully,

R.Nitin Jaganath.

Share this article on:

Comments (2)

ramyani chakrabarty

Blazing goIITian

Joined: 22 Apr 2007

Posts: 2537

4 Jul 2008 22:30:12 IST

Like 0 people liked this

In chemistry, cis-trans isomerism or geometric isomerism or configuration isomerism is a form of stereoisomerism describing the orientation of functional groups within a molecule. In general, such isomers contain double bonds, which cannot rotate, but they can also arise from ring structures, wherein the rotation of bonds is greatly restricted.

The term "geometric isomerism" is considered an obsolete synonym of "cis-trans isomerism" by IUPAC. It is sometimes used as a synonym for general stereoisomerism (e.g., optical isomerism being called geometric isomerism); the correct term for non-optical stereoisomerism is diastereomerism.

There are two forms of a cis-trans isomer, the cis and trans versions. When the substituent groups are oriented in the same direction, the diastereomer is referred to as cis, whereas, when the substituents are oriented in opposing directions, the diastereomer is referred to as trans. An example of a small hydrocarbon displaying cis-trans isomerism is 2-butene.

from wiki

Krishna Gopal Singh

Forum Expert

Joined: 29 Dec 2006

Posts: 5153

5 Jul 2008 01:14:16 IST

Like 0 people liked this

Perfect answer ramyani. well done.

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team