1.Hoàn thành phương trình phản ứng sau: a. CH2= C(CH3)-CH=CH2 + Br2 07/08/2021 Bởi Mary 1.Hoàn thành phương trình phản ứng sau: a. CH2= C(CH3)-CH=CH2 + Br2
Phản ứng isopren $+$ brom: + Cộng $1:1$ $CH_2=C(CH_3)-CH=CH_2 + Br_2 \buildrel{{-80^oC}}\over\longrightarrow CH_2Br-CBr(CH_3)-CH=CH_2$ $CH_2=C(CH_3)-CH=CH_2+ Br_2 \buildrel{{40^oC}}\over\longrightarrow CH_2Br-C(CH_3)=CH-CH_2Br$ + Cộng $1:2$ $CH_2=C(CH_3)-CH=CH_2+ 2Br_2 \longrightarrow CH_2Br-CBr(CH_3)-CHBr-CH_2Br$ Bình luận
a. CH2= C(CH3)-CH=CH2 + Br2 => Cộng 1 : 1 `CH_2=C(CH_3)-CH=CH_2 + Br_2` $\buildrel{{-80^oC}}\over\longrightarrow$ `CH_2Br-CBr(CH_3)-CH=CH_2` `CH_2=C(CH_3)-CH=CH_2+ Br_2 `$\buildrel{{40^oC}}\over\longrightarrow$`CH_2Br-C(CH_3)=CH-CH_2Br` Bình luận
Phản ứng isopren $+$ brom:
+ Cộng $1:1$
$CH_2=C(CH_3)-CH=CH_2 + Br_2 \buildrel{{-80^oC}}\over\longrightarrow CH_2Br-CBr(CH_3)-CH=CH_2$
$CH_2=C(CH_3)-CH=CH_2+ Br_2 \buildrel{{40^oC}}\over\longrightarrow CH_2Br-C(CH_3)=CH-CH_2Br$
+ Cộng $1:2$
$CH_2=C(CH_3)-CH=CH_2+ 2Br_2 \longrightarrow CH_2Br-CBr(CH_3)-CHBr-CH_2Br$
a. CH2= C(CH3)-CH=CH2 + Br2
=>
Cộng 1 : 1
`CH_2=C(CH_3)-CH=CH_2 + Br_2` $\buildrel{{-80^oC}}\over\longrightarrow$ `CH_2Br-CBr(CH_3)-CH=CH_2`
`CH_2=C(CH_3)-CH=CH_2+ Br_2 `$\buildrel{{40^oC}}\over\longrightarrow$`CH_2Br-C(CH_3)=CH-CH_2Br`