Table 1 The molecular weights, microanalysis, colours, molecular formulae, empirical formulae, and molar conductance data of CPAQ ligand and its metal chelates.
No | Molecular formula (Empirical formulae) | M.p. (°C) (M. Wt.) | Colour (Λm) | Microanalysis found (Calc.) % | |||
|---|---|---|---|---|---|---|---|
% C | % H | % N | % M* | ||||
CPAQ | (C15H8Cl2N4O3) L | 250 (363.16) | Orange (–) | 49.87 (49.61) | 2.47 (2.22) | 15.60 (15.43) | – |
CPAQ-Zn | [C30H17Cl4N8O7.5Zn) [Zn(L)2]·1.5H2O | 270 (816.71) | Orange (11.8) | 44.30 (44.12) | 2.31 (2.1) | 13.91 (13.72) | 8.83 (8.01) |
CPAQ-Cu | [C30H15Cl4CuN8O6.5] [Cu(L)2]·0.5H2O | 276 (796.85) | Brown (13.5) | 44.95 (45.22) | 2.17 (1.90) | 14.08 (14.06) | 8.30 (7.97) |
CPAQ-Cd | [C30H14CdCl4N8O6] [Cd(L)2] | Over 300 (836.71) | Orange (12.5) | 43.27 (43.06) | 1.85 (1.69) | 13.62 (13.39) | 12.84 (13.43) |
CPAQ-Ni | [NiLCl(H2O)3] C15H13Cl3N4NiO6 | 270 (510.34) | Orange (15.2) | 35.49 (35.30) | 2.65 (2.57) | 11.15 (10.98) | 11.52 (11.50) |
CPAQ-Co | [C15H9Cl3CoN4O4] [CoLCl(H2O)] | 243 (474.55) | Reddish orange (10.3) | 38.2 (37.96) | 2.08 (1.91) | 11.93 (11.81) | 12.06 (12.42) |
