Compound

R

R1

Ar

A

H

H

4-cholorobenzaldehyde

B

CH₃

H

4-cholorobenzaldehyde

c

CH₃

CH₃

4-cholorobenzaldehyde

D

H

H

3, 5 Dibromo benzaldehyde

E

CH₃

H

3, 5 Dibromo benzaldehyde

F

CH₃

CH₃

3, 5 Dibromo benzaldehyde

G

H

H

5-Bromo-3-nitro, Salicylaldehyde

H

CH₃

H

5-Bromo-3-nitro, Salicylaldehyde

I

CH₃

CH₃

5-Bromo-3-nitro, Salicylaldehyde

J

H

H

2-Nitro-benzaldehyde

K

CH₃

H

2-Nitro-benzaldehyde

L

CH₃

CH₃

2-Nitro-benzaldehyde

M

H

H

4-methoxy benzaldehyde

N

CH₃

H

4-methoxy benzaldehyde

O

CH₃

CH₃

4-methoxy benzaldehyde