Table 6 Magnetic moments, electronic spectra and molar extension coefficient of OBH and its complexes
Compound | μeff (BM) | Intraligand and charge transfer transition, cm−1 (*ɛ) | d–d transition cm−1 (*ɛ) | Proposed structure |
|---|---|---|---|---|
OBH | – | 38,460 (790) | – | |
[Co(OBH)2Cl]Cl·½EtOH | 2.51 | 37,450 (195.8); 23,320 (115.8) | 15,250 (94) | Square-pyramid |
[Zr(OBH)Cl4]·2H2O | – | 36,495 (399); 22,830 (117.6) | – | Octahedral |
[Zn(OBH–H)2] | – | 37,450 (530); 35,335 (885) | – | Tetrahedral |
[VO(OBH–H)2]·H2O | 0.00 | 38,060; 35,040; 29.210 | Square-pyramid | |
[Cu(OBH)2Cl2]·2H2O | 1.45 | 39,840; 37,590; 25,510; 23,810 (350) | 20,080 | Octahedral |
[Ni2(OBH)Cl4]·H2O·EtOH | 1.36a | 39,840; 37,590; 28,330 | 19,050 | Square-planar + tetrahedral |
[Pd2(OBH)(H2O)2Cl4]·2H2O | 0.00 | 37,540; 28,470 | 21,500 (310) | Square-pyramid |