International Journal of Inorganic Chemistry / 2013 / Article / Tab 1 / Research Article
Synthesis, Characterization, and Biological Studies of Binuclear Copper(II) Complexes of (2E)-2-(2-Hydroxy-3-Methoxybenzylidene)-4 N -Substituted Hydrazinecarbothioamides Table 1 Analytical data, electronic spectra of ligands, and their metal complexes.
Ligand/ complex Mol. Wt Yield Colour M.P Elemental analysis % found (cal)
Electronic spectral data (%)
°C C H N S (BM) (
) Electronic transition Assignment
226 89.30 White 220 47.87 (47.9) 4.95 (4.92) 18.64 (18.60) 14.29 (14.23) — — — — 1 650 80.40 Green 194 18.52 (18.47) 1.88 (1.89) 7.16 (7.18) 5.47 (5.48) 0.6302 22 16010 24027 32786 d-d transition Charge transfer
band
240 86.00 White 232 50.17 (50.19) 5.437 (5.47) 17.51 (17.55) 13.42 (13.40) — — — — 2 678 84.00 Light green 180 19.57 (19.59) 2.15 (2.13) 6.86 (6.88) 5.27 (5.23) 0.6902 20 16048 24367 32894 d-d transition Charge transfer
band
254 71.20 White 226 52.16 (52.15) 5.976 (5.96) 16.54 (16.58) 12.68 (12.65) — — — — 3 706 70.30 Light green 170 20.65 (20.61) 2.39 (2.36) 6.58 (6.55) 5.13 (5.00) 0.7026 17 17120 23640 32573 d-d transition Charge transfer
band
302 74.80 White 206 59.71 (59.78) 5.019 (5.02) 13.95 (13.94) 10.66 (10.64) — — — — 4 802 72.58 Light green 168 24.48 (24.44) 2.15 (2.05) 5.63 (5.69) 4.38 (4.35) 0.8315 21 16048 24367 32894 d-d transition Charge transfer
→
band