Characterization of Complexes Synthesized Using Schiff Base Ligands and Their Screening for Toxicity Two Fungal and One Bacterial Species on Rice Pathogens

Table 13

Electronic spectra and magnetic moment data for VO(II) complexes with L1–L6 ligands predicted molecular formula, structure, and geometry.

S. number	Molecular formula-electronic spectra^b bands, transitions^a,; predicted structure (a rough M–L sketch given), and geometry^a				BM
1	[VO(BHFH)Cl]2; M–M complex with Cl bridges, V=O and two L1 with –O, –O, and –N coordination	28,006; 18,270; 13,330	2B2-2A1; 2B2-2B1; 2B2-2E; Correspond to Oh symmetry with tetragonal distortion.		1.54; M–M
2	[VO(BHEH)Cl]2; M–M complex with Cl bridges, V=O and two L2 with –O, –O, and –N coordination	25,000; 14,920; 13,000			1.63; M–M
3	[VO(HAEP)(H2O)2]; Distorted Oh complex, V=O, two –OH2, and L3 with –N, –O, and –S coordination on the equatorial plane	25,000; 22,200; 13,560			1.72
4	[VO(BFH)2(H2O)]; Distorted Oh complex, V=O, –OH2, and two L4 with –N, –O coordination	25,000-; 22,200; 16,100			1.74
5	[VO(BHDH)(H2O)]; Distorted Oh complex, V=O, –OH2, and L5 with –N, –O, –O, and –O coordination on the equatorial plane	25,800; 15,380; 13,150			1.71
6	[VO(DHA)2(H2O)]; Distorted Oh complex, V=O, –OH2, and two L6 with –O, –O coordination on the equatorial plane	30,000; 25,500; 18,180			1.72

Lever [73]; Rana et al. [104]; ^bRecorded for solid compounds (mull-diffuse reflectance) at room temperature—Figures 1 and 2.