4 Ar
a, C6H5
f, 2-ClC6H4
b, 2-CH3C6H4
g, 2,4-Cl2C6H3
c, 4-CH3C6H4
h, 4-ClC6H4
d, 2-OCH3C6H4
i, 4-NO2C6H4
e, 4-OCH3C6H4
j, 3,4-OCH 2OC6H3