問題詳情

21. The proton NMR spectrum of an unknown compound contains a triplet at 9.8 ppm. Which of the following could be this unknown?
(A) (CH3)3CCHO
(B)CH3CH2CH2CO2H
(C) CH3CH2CH2CHO
(D) CH3CO CH2Ph
(E)PhCHO

參考答案

答案:C
難度:簡單0.714286
統計:A(0),B(0),C(5),D(0),E(2)

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