試題詳解

60. Rank the following molecules in order of decreasing C-C bond length of their shortest C-C bonds. ① benzene ② 1,3-butadiene (CH₂CHCHCH₂) ③ 1,2-propadiene (CH₂CCH₂) ④ethyne (HCCH)
(A) ① ＞ ②＞ ③ ＞④ 
(B) ④＞ ③＞ ②＞ ①
(C) ③＞ ②＞ ④ ＞ ① 
(D) ①＞ ③＞ ② ＞ ④ 
(E) ④＞ ② ＞ ③＞ ①