Câu 1 : Viết các phương trình phản ứng :
a) Buta-1,3-dien + H2 ( Ni,t°C )
b) Buta-1,3-dien + Br2 ( dư )
c) Buta–1,3–dien + HBr ( 40°C )
d) Isopren + H2 ( Ni, t° )
e) Isopren + Br2 ( dư )
Câu 1 : Viết các phương trình phản ứng :
a) Buta-1,3-dien + H2 ( Ni,t°C )
b) Buta-1,3-dien + Br2 ( dư )
c) Buta–1,3–dien + HBr ( 40°C )
d) Isopren + H2 ( Ni, t° )
e) Isopren + Br2 ( dư )
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a.
$C{H_2} = CH – CH = C{H_2} + 2{H_2}\xrightarrow{{Ni,\,\,{t^o}}}C{H_3} – C{H_2} – C{H_2} – C{H_3}$
b.
$CH_2=CH-CH=CH_2 + 2Br_2 \to BrCH_2-CHBr-CHBr-CH_2Br$
c.
$C{H_2} = CH – CH = C{H_2}{\text{ }} + {\text{ }}HBr\xrightarrow{{{{40}^o}C}}C{H_3} – CH = CH – C{H_2}Br$
d.
$C{H_2} = C\left( {C{H_3}} \right) – CH = C{H_2}{\text{ }} + {\text{ 2}}{H_2}{\text{ }}\xrightarrow{{Ni,\,\,{t^o}}}C{H_3} – CH\left( {C{H_3}} \right) – C{H_2} – C{H_3}$
e.
$C{H_2} = C\left( {C{H_3}} \right) – CH = C{H_2}{\text{ }} + {\text{ 2}}B{r_2}{\text{ }} \to BrC{H_2} – C\left( {Br} \right)\left( {C{H_3}} \right) – CHBr – C{H_2}Br$