We appreciate the recommendation and rewrite the abstract as follows, Polytopic organic ligands with hydrazone moiety are in the forefront of new drug research among many others due to their unique and versatile functionality and ease of strategic ligand design. Quantum chemical calculations of these polyfunctional ligands can be carried out in silico to determine the thermodynamic parameters. In this report two new tritopic dihydrazide ligands, N'2, N'6-bis[(1E)-1-(thiophen-2-yl) ethylidene] pyridine-2, 6-dicarbohydrazide (L1) and N'2, N'6-bis[(1E)-1-(1H-pyrrol-2-yl) ethylidene] pyridine-2, 6-dicarbohydrazide (L2) were successfully prepared by the condensation reaction of pyridine-2, 6-dicarboxylic hydrazide with 2-acetylthiophene and 2-acetylpyrrole. The FT-IR, 1H and 13C NMR as well as mass spectra of both L1 and L2 were recorded and analyzed. Quantum chemical calculations were performed at DFT/B3LYP/cc-pvdz/6-311+ G (d, p) level of theory to study the molecular geometry, vibrational frequencies, and thermodynamic properties including changes of ∆H, ∆S, and ∆G for both the ligands. The optimized vibrational frequency and (1H and 13C) NMR obtained by B3LYP/cc-pvdz/6-311 + G (d, p) showed good agreement with experimental FT-IR and NMR data. Frontier molecular orbital (FMO) calculations were also conducted to find the HOMO, LUMO, and HOMO–LUMO gaps of the two synthesized compounds. To investigate the biological activities of the ligands, L1 and L2 were tested in vitro bioassays against some Gram-negative and Gram-positive bacteria and the fungus strain. In addition, Molecular ‪docking was used to study the molecular behavior of L1 and L2 against tyrosinase from Bacillus megaterium. The outcomes revealed that both L1 and L2 can suppress microbial growth of bacteria and fungi with variable potency. The antibacterial activity results demonstrated the compound L2 to be potentially effective against Bacillus Megaterium with inhibition zones of 12 mm while molecular docking study showed the binding energies for L1 and L2 to be −7.7 and −8.8 kcal mol−1 respectively with tyrosinase from Bacillus megaterium.‪ -
The data at least should be split into 2 more subheads, one for the ligand and receptor preparation and the second for the docking analysis.