試題詳解

27. For the mass spectrum of compound Y, we found 3 lines in the molecular ion region (M⁺ , M⁺ +2, M⁺ +4), shows the peak heights in the ratio of 9 : 6 : 1. What would the compound Y be?
(A) cis-1,2-Dichlorocyclohexane
(B) 2-Chloropentane
(C) cis-1,2-Dibromocyclohexane
(D) Bromobenzene
(E) 1,2-Dibromopentane.