Table 2: Important IR bands of HBS ligand and its complexes (1–6) with their assignments.

Ligand/complex aromatic sym./aysm.

L (HBS)3445 (br)3061 (w)2931 (m)
2897 (w)
1631 (v.s)1162 (w)
1-[Mn2(L)2(H2O)4]3399 (br)3052 (v.w)2927 (m)
2856 (w)
1608 (v.s)1145 (m)454 (v.w)407 (w)
2-[Fe2(H2L)(NO3)6(H2O)2] 6H2O3356 (br)2919 (w)
2851 (w)
1629 (m)1047 (w)581 (v.w)427 (m)1382 (s)
1047 (w)
837 (w)
3-[Co2(HL)2(NO3)2(H2O)2]3425 (br)3056 (v.w)2924 (m)
2854 (w)
1614 (v.s)1139 (w)586 (w)463 (v.w)1320 m
1028 (w)
850 (w)
4-[Ni2(L)(NO3)2(H2O)6]3424 (br)2925 (m)
2856 (w)
1616 (s)1142 (w)462 (w)395 (w)1323 (w)
1039 (w)
754 (w)
5-[Cu2(HL)2(Ac)2(H2O)2]3446 (br)3020 (v.w)2919 (m)
2849 (w)
1624 (v.s)1147 (m)522 (w)470.(w)1535 (s)
1347 (w)
6-[Zn2(HL)2(Ac)2(H2O)2]3418 (br)3011 (v.w)2922 (m)
2850 (m)
1622 (v.s)1188 (m)457 (w)411 (m)1535 (s)
1347 (w)