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Table 5 Topological parameters (in a.u.) and intermolecular interaction energy (in kcal mol−1) for SSZ (keto)–BNNT-via carbonyl at the B3LYP level of theory

From: Interaction of sulfasalazine with outer surface of boron-nitride nanotube as a drug carrier in aqueous solution: insights from quantum mechanics and Monte Carlo simulation

Intramolecular bond

\(r\)(Ã…)

\(\rho (r)\)

\(\nabla^{2} \rho (r)\)

E

G

V

GVR

\(C_{240} - O_{220} \cdots B_{31}\)

2.55

0.014615

0.050073

3.49

0.011823

− 0.011128

1.062

\(C_{244} - O_{222} \cdots N_{58}\)

3.14

0.008680

0.033855

1.90

0.007260

− 0.006055

1.199

\(C_{244} - O_{222} \cdots N_{33}\)

3.01

0.009077

0.031465

1.99

0.007105

− 0.006345

1.120

  1. * According to Fig. 1, C240, O220, C244 and O222 are C1, O1, C2 and O3