Table 4. Results of the Theoretical Topological Analysis of the Bond Critical Points (3, −1) between M and M′ in Complexes trans- and cis-5MM′ (M = Ni, Pd, Pt; M′ = Cu, Ag, Au)^a.

	trans-5NiCu	trans-5PdCu	trans-5PtCu	trans-5PdAg	trans-5PtAg	trans-5PdAu	trans-5PtAu	cis-5PtCu	cis-5PtAg
ρ(rb)	0.02208	0.02620	0.03132	0.02879	0.03348	0.03607	0.04117	0.03090	0.03178
∇2ρ(rb)	0.03699	0.05862	0.07437	0.07135	0.08161	0.08916	0.09973	0.07583	0.07717
G(rb)	0.01299	0.01785	0.02215	0.02193	0.02516	0.02773	0.03093	0.02235	0.02358
V(rb)	–0.01672	–0.02105	–0.02572	–0.02601	–0.02994	–0.03319	–0.03698	–0.02575	–0.02788
|V(rb)|/G(rb)	1.288	1.179	1.161	1.186	1.190	1.197	1.196	1.152	1.182
G(rb)/ρ(rb)	0.588	0.681	0.707	0.762	0.752	0.769	0.751	0.723	0.742
H(rb)	–0.00374	–0.00320	–0.00357	–0.00409	–0.00478	–0.00546	–0.00605	–0.00340	–0.00430
sign(λ2(rb))ρ(rb)	–0.022	–0.026	–0.031	–0.029	–0.033	–0.036	–0.041	–0.031	–0.032

^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), the product of sign of second largest eigenvalue of Hessian matrix of electron density (λ₂(r_b)), and ρ(r_b) in au.