Table 7. Results of the Theoretical Topological Analysis of the Bond Critical Points (3, −1) between M and M′ in Complexes 6MM′, 7MM′, and 8MM′ (M = Ni, Pt; M′ = Cu, Au)^a.

	cis-6PtCu	cis-6PtAu	trans-6PtAu	cis–trans-7NiAu	trans-7PtAu	trans-8NiCu·acetone	trans-8PtAu
ρ(rb)	0.02865	0.02747	0.03683	0.02971	0.04399		0.04910
∇2ρ(rb)	0.06417	0.06334	0.08831	0.06891	0.10923		0.11946
G(rb)	0.01908	0.01815	0.02673	0.02119	0.03430		0.03867
V(rb)	–0.02213	–0.02048	–0.03143	–0.02516	–0.04137		–0.04757
|V(rb)|/G(rb)	1.160	1.129	1.176	1.187	1.206		1.230
G(rb)/ρ(rb)	0.666	0.661	0.726	0.713	0.780		0.788
H(rb)	–0.00305	–0.00233	–0.00470	–0.00397	–0.00707		–0.00890
sign(λ2(rb))ρ(rb)	–0.029	–0.027	–0.037	–0.030	–0.044		–0.049

^aElectron density (ρ(r_b) in au), Laplacian of electron density (∇²ρ(r_b) in au), Lagrangian kinetic energy density (G(r_b) in au), potential energy density (V(r_b) in au), ratio |V(r_b)|/G(r_b), ratio G(r_b)/ρ(r_b) in au, electron energy density (H(r_b) in au), ratio H(r_b)/ρ(r_b) in au, the product of sign of the second largest eigenvalue of Hessian matrix of electron density (λ₂(r_b)), and ρ(r_b) in au.