Table 1: Physical data of ligand (HBS) and corresponding metal complexes.

Ligand/complex
Mol. formula
(Yield) % M.wt Colour M.P. °C
(L : M)
Elemental analyses (Found) Calc. %
CHNM

L (HBS)
C20H24N2O2
(83.73)
324
Yellow72(73.65)
74.07
(7.77)
7.41
(8.59)
8.64
1-[Mn2(L)2(H2O)4]
C40H52N4O8Mn2
(43.64)
826.08
Dark
green
>300
(1 : 2)
(57.59)
58.10
(5.76)
6.29
(6.51)
6.77
(12.67)
13.33
2-[Fe2(H2L)(NO3)6(H2O)2] 6H2O
C20H40N8O28Fe2
(66.25)
952
Reddish brown>300
(1 : 2)
(24.6)
25.21
(3.95)
4.20
(10.9)
11.76
(12.08)
11.76
3-[Co2(HL)2(NO3)2(H2O)2]
C40H50N6O12Co2
(30.23)
923.8
Dark
green
>300
(1 : 1)
(50.67) 51.95(5.35)
5.41
(9.70)
9.09
(13.08)
12.70
4-[Ni2(L)(NO3)2(H2O)6]
C20H34N4O14Ni2
(35.43)
671.4
Green>300
(1 : 2)
(36.12)
35.75
(4.19)
5.05
(8.76)
8.33
(17.83)
17.49
5-[Cu2(HL)2(Ac)2(H2O)2]
C44H56N4O10Cu2
(47.00)
927.3
Dark
green
>300
(1 : 1)
(57.06) 56.95(5.94)
6.04
(6.70)
6.04
(13.80)
13.70
6-[Zn2(HL)2(Ac)2(H2O)2]
C40H48N4O6Zn2
(78.63)
930.8
Yellowish white>300
(1 : 1)
(57.55)
56.72
(5.10)
6.01
(6.24)
6.02
(13.41)
13.85