Table 1: The analytical data of the proposed stoichiometry of the complexes.
No | Mol. formula/general formula | Color | M.P. | Mol. Wt. | C% calcd. (found) | H% calcd. (found) | N% calcd. (found) |
1 | Mn(C8H9N2O)2 | Pale yellow | 220 | 352.94 | 54.40 | 5.10 | 15.86 |
Mn(L)2 | (54.60) | (5.82) | (15.81) | ||||
2 | Cr(C8H9N2O)3 | Greenish yellow | 205 | 498.996 | 57.71 | 5.41 | 16.83 |
Cr(L)3 | (57.06) | (6.00) | (16.77) | ||||
3 | Fe(C8H9N2O)3 | Brownish yellow | 108 | 502.84 | 57.27 | 5.37 | 16.70 |
Fe(L)3 | (57.27) | (5.25) | (16.62) | ||||
4 | Co(C8H9N2O)2 | Yellow | 210 | 356.93 | 53.79 | 5.04 | 15.69 |
Co(L)2 | (53.50) | (5.15) | (15.80) | ||||
5 | Ni(C8H9N2O)2·2H2O | Greenish yellow | 207 | 392.69 | 48.89 | 5.60 | 14.26 |
Ni(L)2.2H2O | (48.70) | (5.61) | (14.50) | ||||
6 | Cu(C8H9N2O)2·2H2O | Gray yellow | 220 | 397.55 | 48.29 | 5.53 | 14.08 |
Cu(L)2.2H2O | (48.70) | (5.93) | (14.79) | ||||
9 | Cd(C8H9N2O)2 | Pale yellow | >300 | 410.41 | 46.78 | 4.39 | 13.64 |
Cd(L)2 | 46.60 | 4.41 | 13.55 | ||||
10 | Zn(C8H9N2O)2 | Yellow | 205 | 363.39 | 52.84 | 4.95 | 15.41 |
Zn(L)2 | (52.80) | (5.00) | (15.19) | ||||
11 | Hg(C8H9N2O)2 | Yellow | 198 | 498.5 | 38.51 | 3.61 | 11.23 |
Hg(L)2 | (38.98) | (3.55) | (11.34) | ||||
12 | Ce(C8H9N2O)3 | Yellow | 218–221 | 587.12 | 49.05 | 4.60 | 14.26 |
Ce(L)3 | (50.76) | (4.59) | (14.04) | ||||
13 | UO2(C8H9N2O)2H2O | Yellow | 230 | 586.0 | 38.22 | 3.41 | 9.55 |
UO2(L)2.H2O | (38.54) | (3.64) | (9.60) | ||||