Table 3.

QTAIM parameters for the BCPs. Symmetry codes: i = −x + 1, −y + 1, −z + 2; ii = x + 1, y, z + 1; iii = −x + 1, −y, −z + 1, iv = −x + 1, −y + 1, −z.

Interaction	Bond Length/Interatomic Distance [Å]	ρ(r)	∇2(r)	V(r)	G(r)	ε(r)	d [Å]
Fenamic acid…acridine
O1–H1O	1.0617	0.2637	−1.4900	−0.5182	0.0728	0.0148	0.0006
H1O∙∙∙N2 i	1.5508	0.0789	0.0795	−0.0792	0.0495	0.0291	0.0004
O2∙∙∙H27A ii	2.4505	0.0088	0.0315	−0.0051	0.0065	0.0542	0.0127
O2∙∙∙H25A ii	2.7734	0.0048	0.0170	−0.0028	0.0035	0.0884	0.0229
1
O1–H1O	0.990(18)	0.2659	−1.5189	−0.5191	0.0697	0.0156	0.0006
H1O∙∙∙N2	1.626(18)	0.0731	0.0857	−0.0718	0.0466	0.0337	0.0007
O2∙∙∙H22	2.860	0.0043	0.0162	−0.0025	0.0033	0.2766	0.1311
2
O1–H1O	1.021(19)	0.2981	−1.9274	−0.6299	0.0740	0.0144	0.0004
H1O∙∙∙N2	1.597(19)	0.0699	0.0992	−0.0697	0.0472	0.0288	0.0002
O2∙∙∙H27 iii	2.4288	0.0089	0.0328	−0.0052	0.0067	0.0531	0.0132
H25∙∙∙O2 iii	3.0584	0.0028	0.0108	−0.0015	0.0021	0.3773	0.0381
3
O1∙∙∙H1O	0.89(2)	0.2705	−1.5980	−0.5406	0.0706	0.0147	0.0007
N2∙∙∙H1O	1.72(2)	0.0727	0.0851	−0.0712	0.0462	0.0295	0.0001
O2∙∙∙H27 iv	2.441	0.0068	0.0243	−0.0040	0.0050	0.0529	0.0160
O2∙∙∙H25 iv	3.098	0.0024	0.0094	−0.0013	0.0018	0.3232	0.0388

Symbols: ρ(r)—electron density at the BCP (bond critical point); ∇²(r)—Laplacian electron density; V(r)—potential energy density; G(r)—kinetic energy; ε(r)—ellipticity of the electron density; d [Å]—the difference between the length of the bond path and the distance between the atoms linked by this bond.