Table 3.

Geometry Index (τ₄) variables for copper(II) complexes.

Complex	Geometry Index (τ4)
	Cu1	Cu2	Cu3	Cu4
1	0.723	0.483	0.741	0.760
2	0.850	0.690	0.846	0.816
3	0.705	0.513	0.789	0.829
4	0.743	0.463	0.829	0.753