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Forum Index -> Organic Chemistry like the article? email it to a friend.  
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[Post New]12 Apr 2007 22:29:44 IST
    Subject: viteee 2006 qs
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astha (0)

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The O-H stretching vibration of alcohols absorbs in the region 3700-3500 cm -1. The O-H stretching of carboxylic acids absorb in the region
a)      3900-3700
b)      3000-2500
c)      3700-3500
d)      1700-2000
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[Post New]13 Apr 2007 10:16:47 IST
    Subject: Re:viteee 2006 qs
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iitkgp_bipin (5892)

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The O-H stretch of a carboxylic acid which has a weaker bond dissociation energy will have a absorption frequency of 2500-3000 cm-1.

For some groups the frequency ranges are :

mass effect on absorption frequencies

Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur

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