Table 7.

EPR spectral parameters of the copper(II) complexes 1–4

	1	2	3	4
Polycrystalline (298 K)
g//	2.22	2.265	2.21	2.18
g⊥	2.042	2.053	2.037	2.047
DMSO (77 K)
g//	2.219	2.188	2.243	2.241
g⊥	2.051	2.077	2.062	2.062
A//	177	174	173	175
α2	0.7691	0.7410	0.7867	0.7903
β2	0.9366	0.8570	0.9752	0.9491
δ2	0.7460	0.9286	0.8376	0.8286
K//	0.7204	0.6351	0.7672	0.7501
K⊥	0.5738	0.6881	0.6590	0.6549