Synthesis, CP-MAS NMR Characterization, and Antibacterial Activities of Glycine and Histidine Complexes of Cd(SeCN)₂ and Hg(SeCN)₂

Table 5

Solid-state ¹³C Isotropic Chemical Shifts (δ _iso) and Principle Shielding Tensors(𝜎_𝑥𝑥)^a of complexes Cd(II)-Selenocyanate complexes with Glycine and Histidine ligands.

Complex	Nucleus	𝛿iso	𝜎11	𝜎22	𝜎33	Δ𝜎	𝜂
Cd(SeCN)2	^113Cd	211.9	322	283	30	291	0.73
	^77Se	−119.6	53	41	−452	505	0.96
	^13C	117.0	222	205	−76	298	0.89
(Gly)Cd(SeCN)2	^13C	170.8	242	171	98	−109	0.98
	^13C	119.9	212	124	23	−146	0.90
(His)Cd(SeCN)2	^13C	169.3	236	169	102	−101	0.99
	^13C	108.4	181	103	41	−101	0.86
	^13C	132.0	202	136	58	−111	0.90
	^13C	129.2	196	130	61	−102	0.96
	^13C	119.5	213	120	23	−142	0.97

^aIsotropic shielding,𝜎_𝑖=(𝜎₁₁+𝜎₂₂+𝜎₃₃)/3; Δ𝜎=𝜎₃₃−0.5 (𝜎₁₁+𝜎₂₂); 𝜂=3(𝜎₂₂−𝜎₁₁)/2Δ𝜎.