問題詳情

44. Which of the following compounds will not display a carbonyl carbon signal in the DEPT-90 and DEPT-13513C NMRspectroscopy? 
(A) only I
(B) only II
(C) only III
(D) I and II
(E) II and III

參考答案

答案:E
難度:適中0.4
統計:A(0),B(0),C(1),D(0),E(2)

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