CHM 2120 Study Guide - Quiz Guide: Diethyl Ether, Benzoyl Group, Methine Group
13 Jun 2015
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Part a. justify your answer: associate each of the following ir spectra with one of the following compounds and. Assignment 5 - answers: propanoic acid: look for a carbonyl stretch and a broad oh stretch, 2-pentanol: look for an oh peak (broad). No carbonyl peak, no sp2 ch"s: benzyl alcohol; look for an oh peak and sp2 ch"s. No carbonyl peak: acetophenone: look for a carbonyl peak and sp2 ch"s. Identifying the peaks on the spectrum directly is an straightforward way to do this. sp3 ch"s. No other key groups: 4-methylpentanenitrile: look for a c(cid:0)n. no oh, c=o or (cid:0)ch, p-acetylbenzonitrile: look for c=o, sp2 ch"s and c(cid:0)n. no (cid:0)ch. Note: the key functional groups must be identified. Identifying the peaks on the spectrum directly is an straightforward way to do this. 4: give the number of peaks expected for the indicated protons in each of the. 5: explain the following differences in chemical shift.
