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Organic Chemistry

Blazing goIITian

Joined:	21 Dec 2007
Post:	1025

21 May 2008 16:24:13 IST

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501

org chem steric effects

None

can some one explain

steric inhibition of resonance

and steric effects

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Cool goIITian

Joined: 26 Mar 2007

Posts: 79

21 May 2008 16:28:28 IST

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The structural features which influences the chemical reactions due to bulky substituents is known as stearic effect. When the bulkier groups hinder the reaction it is called stearic hindrance wich may be due to 1) the sheer bulk of the substituents causing the approach of the reagent more difficult or may be due to 2) electronic factor i e., promoting or inhabiting the electron availabilityat a particular site!! eg:- carboxylic groups with highly substituted alpha carbon are esterified with difficulty due to steric effect.

C!-!!NMAY

Blazing goIITian

Joined: 30 Mar 2008

Posts: 1415

21 May 2008 16:31:40 IST

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yup due to bulky groups species can not attack on molecule so easily....and it influence the chemical reaction and chemical properties ,,,,this is called steric effect

C!-!!NMAY

Blazing goIITian

Joined: 30 Mar 2008

Posts: 1415

21 May 2008 17:07:53 IST

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for example in tertiary amines due to three alkyl groups electron pair cannot be donated by nitrogen....so it is a weaker base....

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