問題詳情

47. A compound which EI-MS spectrum is shown below, has M+ = m/z 156, M+2 = m/z 158, and m/z = 77(base peak). What is the possible formula for this compound?  


(A) C5H10Cl
(B) C5H12Br
(C) C6H5Cl
(D) C6H5Br

參考答案

答案：D
難度：適中0.5
統計：A(0),B(2),C(2),D(9),E(0)