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【单选题】
下列化合物进行 S N 1 的活性最大的是( )
A.
CH 3 Cl
B.
(CH 3 ) 3 CCl
C.
CH 3 CH 2 Cl
D.
CH 2 =CHCH 2 Cl
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A.
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A.
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B.
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