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The results of detailed experimental and theoretical study of chemical intra-and intermolecular bonding of salicyl hydrazone complex with SnCl 3 are described. The chemical bonding pattern in the crystal and isolated molecule is described in terms of Bader's "Atoms in Molecules" (AIM) theory. Analysis of AIM charges has revealed that amount of charge transferred from ligand to SnCl 3 moiety is equal to ≈ 0.3 e that leads to significant redistribution of bond lengths as compared to other tin(IV) salicyl hydrazonates. Comparison of geometry and characteristics of electron density distribution indicates the weakening of coordination Sn-O and Sn-N bonds in isolated molecule in comparison with crystal up to 10 kcal/mol. This effect was explained by the intermolecular H···Cl bonding. According to the Hirshfeld surface analysis, these interactions have the most pronounced contribution to the crystal packing energy. The significance of the present article lies in both the detailed inspection of the crystal packing effect on the coordination bonds of the tin(IV) atom and intermolecular interactions governing the supramolecular self-assembly of hydrogen-bonded chains by means of specific interactions and π···π stacking.

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