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

Table 6

Solid-state ¹⁵N isotropic chemical shifts (𝛿_iso) and principle shielding tensors (𝛿_𝑥𝑥)^a of complexes, Hg(II)-selenocyanate complexes.

Complex	Nucleus	𝛿iso	𝛿11	𝛿22	𝛿33	Δ𝜎	𝜂
His	^15N	−202.55	−97.76	−181	−328.85	−189.45	0.66
	^15N	−331.02	—	—	—	—	—
(His)Hg(SeCN)2	^15N	−156.73	−27.66	—	−272.80	−174.11	0.80
	^15N	−146.5	—	169.72	—	—	—
Gly	^15N	−345.56	—	—	—	—	—
(Gly)Hg(SeCN)2	^15N	−311.01	—	—	—	—	—

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