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

Table 16

Predicted molecular formula, structure, and geometry from electronic spectra and magnetic moment data for Fe(III) complexes with L1–L3.

S. number	Molecular formula-electronic spectra^b bands, transitions^a,; predicted structure (a rough M–L sketch given), and geometry^a			BM
1	[Fe(BHFH)Cl2]2; Distorted Oh complex with Cl bridges, two –Cl, and two L1 with –O, –O, and –N coordination on the equatorial plane	23,260; 21,740; 19,040; 17,540		5.70; M–M
2	[Fe(BHEH)(H2O)Cl]2; Distorted Oh complex with Cl bridges, two –OH2, and two L2 with –O, –O, and –N coordination on the equatorial plane	26,670; 22,220; 18,520; 17,390; 15,600		5.73; M–M
3	[Fe(HAEP)(H2O)Cl]2; Distorted Oh complex with S bridges, two –OH2, two –Cl, and two L3 with –O, –N, and –S (used in bridging) coordination on the equatorial plane	Extremely weak transitions		5.88; M–M

Oh geometry with metal-metal interactions; ^bRecorded for solid compounds (mull-diffuse reflectance) at room temperature—Figure 5.