試題詳解

5. Rank the following molecules, ions and radicals in order of increasing H－C－H bond angles: CH₃⁺; CH₃^-; CH₂; CH₂²⁺.
(A)CH₂²⁺＞CH₃⁺＞CH₂＞CH₃^-
(B)CH₃^-＞CH₂＞CH₃⁺＞CH₂²⁺
(C)CH₂＞CH₃⁺＞CH₃^-＞CH₂²⁺
(D)CH₃⁺＞CH₂²+CH₂＞CH₃^-
(E)CH₃⁺=CH₂²⁺=CH₂=CH₃^-