CHO DÃY CHUYỂN HOÁ SAU
Câu 32 :ĐHA-11: Cho dãy chuyển hoá sau:
Benzen
C
2
H
4
;
to
,
xt
X
Br
2
,
as
(
1
:
1
)
Y
KOH
/
C
2
H
5
OH
;
to
C
2
H
4
;
to
,
xt
Br
2
,
as
(
1
:
1
)
KOH
/
C
2
H
5
OH
;
to