,H-CEFC
n -
Henan
capters
Autylene
·
Acidity of Alkyne :% (s) ↑ s
acidity ↑
-- - 25 %
a
-= 33%
50 %
i
-
C= -
R - OH
-
R 08
-
Preparation of alkynes :
a -
Elimination of difaldide:
Y
C C-
NHS
&
-
-
Chongbase)
↓ *
c = c + H x-
-
-
c= -
H
Y Y Y
C -
1 NH)-
&
- -
shong basea
I
↓
,-
2
Achynes from Acetylide
H - c=C -
H
NHLNa/Nis only with 1"RX not with 20 RX
H-C =-But - HC = C
-
CH2-CHg + Br
NUR
anbonyl
3-Reaction with
groupment :
i formaldehyde
HH
i
#p Aldehyde
⑭
Ketone
p
-
· HLECH NANHa HCECO
O OH
Gi
Hec-chh-ce-H -deH
0- OH
-
I
I
H
, -rin- b R
Reactions of alhymes
-Catalytic hychogenation
Chem 250 review
C=
---
&Has
-
pi!
Pd(s)/
Pb(s) .
2
Hydrogenation with "Lindlert"
catalyst : We obtain is achine
C
-
=
-
* =
c cis alhene
/
3
Alkyme with sodium in Liquid ammonia Nay/NH3(e) :
we obtain trans altere
*
-
c= -Manes Y /
= tran othere
n -
Henan
capters
Autylene
·
Acidity of Alkyne :% (s) ↑ s
acidity ↑
-- - 25 %
a
-= 33%
50 %
i
-
C= -
R - OH
-
R 08
-
Preparation of alkynes :
a -
Elimination of difaldide:
Y
C C-
NHS
&
-
-
Chongbase)
↓ *
c = c + H x-
-
-
c= -
H
Y Y Y
C -
1 NH)-
&
- -
shong basea
I
↓
,-
2
Achynes from Acetylide
H - c=C -
H
NHLNa/Nis only with 1"RX not with 20 RX
H-C =-But - HC = C
-
CH2-CHg + Br
NUR
anbonyl
3-Reaction with
groupment :
i formaldehyde
HH
i
#p Aldehyde
⑭
Ketone
p
-
· HLECH NANHa HCECO
O OH
Gi
Hec-chh-ce-H -deH
0- OH
-
I
I
H
, -rin- b R
Reactions of alhymes
-Catalytic hychogenation
Chem 250 review
C=
---
&Has
-
pi!
Pd(s)/
Pb(s) .
2
Hydrogenation with "Lindlert"
catalyst : We obtain is achine
C
-
=
-
* =
c cis alhene
/
3
Alkyme with sodium in Liquid ammonia Nay/NH3(e) :
we obtain trans altere
*
-
c= -Manes Y /
= tran othere
