Table 3.
Electronic transitions of perimidine compounds and their VO(II) complexes.
| Compounds | μ eff (BM) | d-d transition bands (cm−1) | Intraligand and charge transfer (cm−1) |
|---|---|---|---|
| (1) (C25H18N4O) (L1) | — | — | 31,746; 26,316; 23,923; 18,868 |
| (2) [(VO)2 (SO4)2 (L1)]H2O | 1.66 | 15,290; 12800 | 35,714; 29,412; 25,641; 24,272; 17,857 |
| (3) (C26H20N4O2) (L2) | — | — | 38,168; 28,249; 23,810; 19,048 |
| (4) [(VO)2 (SO4)2 (L2)]2H2O | 1.68 | 15,393; 12750 | 37,037; 30,769; 26,316; 23,256; 17,544 |
| (5) (C25H17N5O3) (L3) | — | — | 36,364; 30,303; 26,316; 23,810; 19,157 |
| (6) [(VO)2 (SO4)2 (L3)]H2O | 1.66 | 15,873; 12830 | 37,037; 28,571; 26,667; 18,182 |
| (7) (C25H17N4OCl) (L4) | — | — | 31,746; 25,974; 18,587 |
| (8) [(VO)2 (SO4)2 (L4)]H2O | 1.67 | 15,385; 12,800 | 35,714; 30,303; 25,974; 24,390; 17,857 |
| (9) (C25H17N4OCl) (L5) | — | — | 31,250; 26,316; 24,390; 18,182 |
| (10) [(VO)2 (SO4)2 (L5)]3H2O | 1.65 | 15,873; 12780 | 35,714; 30,769; 25,000; 23,256; 18,868 |