hello hello
助教叫我把大家問他的提的ans po 上來
ques:3.4.5圓環,的哪一個reaction rate 較快?
(就是環上有一個br or cl 的取代基),經過sn1 or sn2 reaction
ans: 5 > 4 > 3
reason: it's sn1. it must have a carbocation,and it's a planar
so for 3-carbons the strainenergy will be the largeest.
for sn2 rxn, the trigonal-bipyramid is also a planar at the middle
of the transition state .for the smae reason,the rate is 5>4>3
大家考試順利,
加油加油
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