Table 3.

Some electronic constants of the substituents in the compounds 6-24.

Compound	Substituent	σm	σp	F	R
6	H	-	-	-	-
7	o-Cl	-	-	0.41	-0.15
8	m-Cl	0.37	-	0.41	-0.15
9	p-Cl	-	0.23	0.41	-0.15
10	o,p-DiCl	-	0.23	0.41	-0.15
11	o-NO2	-	-	0.67	0.16
12	m-NO2	0.71	-	0.67	0.16
13	p-NO2	-	0.78	0.67	0.16
14	o-F	-	-	0.43	-0.34
15	m-F	0.34	-	0.43	-0.34
16	p-F	-	0.06	0.43	-0.34
17	o,p-DiF	-	0.06	0.43	-0.34
18	o-CH3	-	-	-0.04	-0.13
19	m-CH3	-0.07	-	-0.04	-0.13
20	p-CH3	-	-0.17	-0.04	-0.13
21	o-OCH3	-	-	0.26	-0.51
22	m-OCH3	0.12	-	0.26	-0.51
23	p-OCH3	-	-0.27	0.26	-0.51
24	o,p-DiOCH3	-	-0.27	0.26	-0.51

σ_m: Hammett substituent constant for meta position; σ_p: Hammett substituent constant for para position; F: Field effect constant; R: Resonance effect constant