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

Table 14

Predicted molecular formula, structure and geometry from electronic spectra and magnetic moment data for Cr(III) complexes with L3–L6 ligands.

S. number	Molecular formula-electronic spectra^b bands, transitions^a,; predicted structure (a rough M–L sketch given), and geometry^a				BM
1	[Cr(HAEP)(H2O)Cl]2; Distorted Oh complex with Cl bridges, two –OH2, and two L3 with –O, –N, and –S coordination on the equatorial plane	27,930; 17,390	4A2g-4T1g (F); 4A2g-4T2g; Charge transfer transition; 4A2g-4T1g (P) is obscured due to dark colour; Octahedral symmetry high-spin complex		3.49; M–M
2	[Cr(BFH)(H2O)Cl2]2; Distorted Oh complex with Cl bridges, two –Cl, two –OH2, and two L3 with –O, –N coordination on the equatorial plane	27,878; 17,420			3.55; M–M
3	[Cr(BFH)2(H2O)Cl]; Distorted Oh complex with –OH2, Cl, and two L3 with –O, –N coordination on the equatorial plane	26,670; 17,500			3.88
4	[Cr(BHDH)Cl]2; Distorted Oh complex with Cl bridges and two L5 with –O, –N, –O, and –O coordination on the equatorial plane	28,980; 17,390			3.74; M–M
5	[Cr(DHA)3]; Distorted Oh complex with three L6 with –O, –O coordination	26,670; 18,200			3.89

Lever [73]; ^bRecorded for solid compounds (mull-diffuse reflectance) at room temperature—Figure 3.