Table 3.

Measured absorbence values of synthesized compounds’ metal chelate activities

Compounds	Absorbance and % metal chelate activity
	30		45		60
	A	% Activity	A	% Activity	A	% Activity
4a	0.043	76.5	0.042	77.0	0.042	77.0
4b	0.044	76.0	0.042	77.0	0.042	77.0
4c	0.043	76.5	0.041	77.6	0.042	77.0
4d	0.041	77.6	0.041	77.6	0.041	77.6
4e	0.042	77.0	0.042	77.0	0.043	76.5
4f	0.041	77.6	0.041	77.6	0.040	78.1
4 g	0.045	75.4	0.043	76.5	0.040	78.1
EDTA	0.032	58.5	0.031	59.0	0.030	60.7
α-Tocopherol	0.076	82.5	0.075	83.1	0.072	83.6
Absorbance of control reaction: 0.183