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anonymous
 5 years ago
Infrared spectroscopy help
http://riodb01.ibase.aist.go.jp/sdbs/cgibin/IMG.cgi?imgdir=ir&fname=NIDA4406&sdbsno=1721
Can you identify the C=C bonds peak in this IR
anonymous
 5 years ago
Infrared spectroscopy help http://riodb01.ibase.aist.go.jp/sdbs/cgibin/IMG.cgi?imgdir=ir&fname=NIDA4406&sdbsno=1721 Can you identify the C=C bonds peak in this IR

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chmvijay
 5 years ago
Best ResponseYou've already chosen the best response.0yaa if C=C bond is asymmetric usualy it shows peak around 1650 Cm1

kociela
 5 years ago
Best ResponseYou've already chosen the best response.0picture isn't showing up and gives forbiden banner, can be because of sdbs. (really distorted / shifted esteer spike get around that 1650?) other main pikes are 31003000 v(=CH) and substitution is from 995650 y(C=CH) area. There is variation by substitution in those all, conjugated gives mainly ~15801640 and others above. double bond energy is generally lower (more stability) with more substituent and readings in the stable gives opposite so maybe something with conjugation and tightening the vibrating bonds (greater energy as in stable, higher cm^1) ? can you upload that image separately ?
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