Characterization of Complexes Synthesized Using Schiff Base Ligands and Their Screening for Toxicity Two Fungal and One Bacterial Species on Rice Pathogens
Table 19
Predicted molecular formula, structure, and geometry from electronic and magnetic moment data for Cu(II) complexes with L1–L3 ligands.
S. number
Molecular formula-electronic spectrab bands, transitionsa, predicted structure (a rough M–L sketch given), and geometrya
BM
1
[Cu(BHFH)]2Distorted square-planar complex with M–M complex with –O of L1 bridges and L1 with the rest of –O, –N coordination
28,570 (sm) 14,300 (b)
Strong charge-transfer band d-pi* transition 2B2g-Eg 2B2g-2A1g 2B2g-2B1g Normally Cu(II) show broad bands around 16670–1110 cm−1. The observed spectra resemble Cu(II)-SB complexes whose geometry is considered square planar
1.50 M–M
2
[Cu(BHFH)H2O] Distorted square-planar complex with –OH2 and L1 with –O, –O, and –N coordination
27,030 (s) 18,180 (b)
2.04
3
[Cu(BHEH)Cl] Distorted square-planar complex with –Cl and L1 with –O, –O, and –N coordination
26,650 17,540
1.91
4
[Cu(HAEP)]2Distorted square-planar complex with S bridges and two L3 with –O, –N, and –S (used in bridging) coordination on the equatorial plane
25,640 15,380 13,330
1.40 M–M
Lever [73]; Sutton [107]; Satyanarayana and Mohapathra [108]; Sacconi and Ciampolini [109]; Muzundar and Bhattacharya [110]; Sheela [111]; bRecorded for solid compounds (mull-diffuse reflectance) at room temperature—Figure 8.
