A、PPh<sub>3sub>能把环氧化物转化为烯烃,例如:
请写出上述反应的可能机理。
A、CH<sub>3sub>COCH<sub>2sub>CH<sub>3sub>,CH<sub>3sub>CHO,CF<sub>3sub>CHO,CH<sub>3sub>COCH=CH<sub>2sub> B、 CH<sub>3sub>CHO,CF<sub>3sub>CHO,CH<sub>3sub>COCH<sub>2sub>CH<sub>3sub>,CH<sub>3sub>COCH=CH<sub>2sub> C、 CF<sub>3sub>CHO,CH<sub>3sub>CHO,CH<sub>3sub>COCH=CH<sub>2sub>,CH<sub>3sub>COCH<sub>2sub>CH<sub>3sub> D、 CF<sub>3sub>CHO,CH<sub>3sub>COCH=CH<sub>2sub>,CH<sub>3sub>CHO,CH<sub>3sub>COCH<sub>2sub>CH<sub>3sub>
A、CH<sub>3sub>NH<sub>2sub>〉NH<sub>3sub>〉C<sub>6sub>H<sub>5sub>NHCH<sub>3sub> B、CH<sub>3sub>NH<sub>2sub>〉C<sub>6sub>H<sub>5sub>NHCH<sub>3sub>〉NH<sub>3sub> C、C<sub>6sub>H<sub>5sub>NHCH<sub>3sub>〉NH<sub>3sub>〉CH<sub>3sub>NH<sub>2sub> D、NH<sub>3sub>〉CH<sub>3sub>NH<sub>2sub>〉C<sub>6sub>H<sub>5sub>NHCH<sub>3sub>
A、CH<sub>3sub>CH<sub>2sub>CH<sub>2sub>CH<sub>3sub> B、CH<sub>3sub>CH(CH<sub>3sub>)<sub>2sub> C、CH<sub>3sub>C(CH<sub>3sub>)<sub>3sub> D、(CH<sub>3sub>)<sub>2sub>CHCH<sub>2sub>CH<sub>3sub>
A、CH<sub>3sub>CH(CH<sub>3sub>)CH(Cl)CH<sub>3sub> B、(CH<sub>3sub>)<sub>3sub>CH(Cl)CH<sub>2sub>CH<sub>3sub> C、CH<sub>3sub>CH(Cl)CH<sub>2sub>CH<sub>3sub> D、CH<sub>3sub>CH<sub>2sub>CH(CH<sub>3sub>)CH<sub>2sub>Cl
A、CH<sub>3sub>CHCl(CH<sub>2sub>)<sub>3sub>COOH B、CH<sub>3sub>CH<sub>2sub>CHCl(CH<sub>2sub>)<sub>3sub>COOH C、CH<sub>3sub>(CH<sub>2sub>)<sub>3sub>CHClCOOH D、CH<sub>3sub>(CH<sub>2sub>)<sub>3sub>CCl<sub>2sub>COOH
A、CH<sub>3sub>CO<sub>2sub>CH<sub>3sub> B、CH<sub>3sub>COOC<sub>2sub>H<sub>5sub> C、CH<sub>3sub>COOCH(CH<sub>3sub>)<sub>2sub> D、CH<sub>3sub>COOC(CH<sub>3sub>)<sub>3sub>
A、(CH<sub>3sub>)<sub>3sub>CCH<sub>2sub>Br B、CH<sub>3sub>CH(CH<sub>3sub>)CH(CH<sub>3sub>)CH<sub>2sub>Cl C、CH<sub>3sub>CH<sub>2sub>CH(Br)CH<sub>3sub> D、CH<sub>3sub>CH<sub>2sub>CH(CH<sub>3sub>)CH<sub>2sub>(Cl)
A、CH<sub>3sub>CH<sub>2sub>CH<sub>3sub> B、CH<sub>3sub>(CH<sub>2sub>)<sub>2sub>CH<sub>3sub> C、CH<sub>3sub>CH<sub>3sub> D、CH<sub>2sub>=CHCH<sub>3sub>
A、CH<sub>3sub>COCH<sub>2sub>CH<sub>3sub> B、CH<sub>3sub>COOCOCH<sub>3sub> C、CH<sub>3sub>CH<sub>2sub>OCH<sub>3sub> D、CH<sub>3sub>COOCH<sub>3sub>