Synthesis Characterization and Biological Activity Study of New Schiff and Mannich Bases and Some Metal Complexes Derived from Isatin and Dithiooxamide

Table 4

Electronic spectra, spectral parameters, molar conductivity, and effective magnetic moments (μ _eff) of Schiff and Mannich base complexes.

Comp. no.	Band positions (cm^-1)	Assignment	Dq/B^/(B^/)(cm^-1)	𝛽	10Dq (cm^-1)	Ω (S.mol^-.cm^2)	𝜇 eff (BM)
C1; Mn(II)	𝜈117857	^6A1g(S)→^4T2g(G)	—	—	—	15.0	5.851
	𝜈2 25641	L → M (C.T.)
C2; Co(II)	𝜈1 5352^(*)	^4T1g →^4T2g	0963(705)	0.726	6789	6.05	5.446
	ν 2 13333	^4T1g (F) →^4A2g
	ν 3 16625	^4T1g(F)→^4T1g (P)
	ν 4 27777	L → M (C.T.)
C3; Ni(II)	ν 1 10204	^3A2g →^3T2g^3	1.65(619.6)	0.602	10223	186.0	4.18
	ν 2 14388	A2g →^3T1g (F)^3
	ν 3 21276	A2g →^3T1g (P)
C4; Cu(II)	ν 1 11111	^2B1g →^2A1g	—	—	—	282.0	2.51
	ν 2 16667	^2B1g →^2B2g
	ν 3 22222	^2B1g →^2Eg
	ν 4 28571	L → M (C.T.)
C5; Pd(II)	ν 1 16393	^1A1g →^1A2g	—	—	—	77.0	Diamag.
	ν 2 21276	^1A1g →^1B1g
C6; Ir(III)	ν 1 14705	^1A1g →^3T1g	—	—	—	90.0	Diamag.
	ν 2 18518	^1A1g →^1T2g
	ν 3 22222	L → M (C.T.)
C7; Pt(IV)	ν 1 15625	^1A1g →^3T1g	—	—	—	15.0	Diamag.
	ν 2 21276	^1A1g →^3T2g
	ν 3 23255	L → M (C.T.)
C8; Co(II)	ν 1 5471^(*)	^4T1g →^4T2g	0.843 (762.61)	0785	6430	18.0	4.617
	ν 2 10989	^4T1g →^4A2g
	ν 3 15795	^4T1g (F) →^4T1g (P)
	ν 4 26315	L → M (C.T.)
C9; Ni(II)	ν 1 10172	^3A2g →^3T2g	1.667 (612.2)	0594	10200	20.5	4.251
	ν 2 14845	^3A2g →^3T1g (F)
	ν 3 22727	^3A1g →^3T1g (P)
	ν 4 27027	L → M (C.T.)
C10; Pd(II)	ν 1 16025	^1A1g →^1A2g	—	—	—	9.0	Diamag.
	ν 2 21739	^1A1g →^1B1g
	ν 3 26315	^1A1g →^1Eg
C11; Pt(IV)	ν 1 15908	^1A1g →^3T1g	—	—	—	73.0	Diamag.
	ν 2 27027	L → M (C.T.)
C12; Cd(II)	ν 1 27777	L → M (C.T.)				8.00	Diamag.
	ν 2 32786	Intralig π →π*

* Calculated.