n

特別提醒 單體與鏈節(jié)不同，如

===CH

個碳；無雙鍵，兩個碳”劃線斷開，然后將半鍵閉合即單雙鍵互換。如

ABCl

n

Cl

________(A B

______________________

__________

Cl

Cl

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

_______________________________ eq

\o\ac(△,―)

A

A

E

F，結(jié)合

F

===CH===CH

n

===CH

===CH

A B

B A===CH

B===CH n

A

B===CH B A B B Cl A B B ===CH――→===CH――→

AB

A________________________________________________________________________B_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________(

________________________________________________________________________________

ABS

________________________________________________________________________

ABS

n

____________________

n

n

______________

__________________________________ ____________________________________________________________________________________________________________

HX

X) A B

A B

A B BC

===CH

A

A

A

A B B解析 本題有多種解法，下面給出守恒法。設(shè)===CH

AB

A

B

A

B

________

B

________________________________________________________________________

__________

____________________________________________________ A

________(

B

A

________(B

．碳、氫、氧

A

____________

___________________________________A

BB

A

________________________________________________________ b d

A

____________________________________________________

________________________________________________________________________B

________________________________________________________________________

A

A

A

B

B

R―→RRRX

__________________B____________I__________________________________(

mn

__________________________________________________________________________________________________________________________________ n