异戊烷的二氯代物的同分异构体共有( )A.7种B.8种C.9种D.10
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异戊烷的一氯代物有4种:(CH3)2CHCH2CH2Cl、(CH3)2CHCHClCH3、(CH3)2CClCH2CH3、CH2Cl(CH3)CHCH2CH3;当一氯代物为(CH3)2CHCH2CH2Cl时,二氯代物有4种:(CH3)2CHCH2CHCl2、(CH3)2CHCHClCH2Cl、(CH3)2CClCH2CH2Cl、CH2Cl(CH3)CHCH2CH2Cl;当一氯代物为(CH3)2CHCHClCH3时,二氯代物有3种:(CH3)2CHCCl2CH3、(CH3)2CClCHClCH3、CH2ClCH(CH3)CHClCH3;当一氯代物为(CH3)2CClCH2CH3时,二氯代物有1种:CH2ClC(CH3)ClCH2CH3;当一氯代物为CH2Cl(CH3)CHCH2CH3时,二氯代物有2种:CHCl2CH(CH3)CH2CH3、(CH2Cl)2CHCH2CH3;所以异丁烷的二氯代物的同分异构体共有10种;故选D.