L-alanine derived Schiff base Ligated Vanadium(IV) Complex with Phenanthroline as Co-ligand: Synthesis, Crystal Structure and Hirshfeld Surface Analysis

Abstract A vanadium(IV) Schiff base complex derived from salicylaldehyde and L-alanine with phenanthroline as co-ligand viz. [VIVO(salala)(phen)].0.5H2O.CH3OH (where salala = Schiff base derived from salicylaldehyde and L-alanine, phen = 1,10-phenanthroline) was synthesized and its structure determined by single crystal X-ray diffraction. The crystal lattice parameters of the complex was determined by single crystal X-ray diffraction with lattice parameters, a = 18.4361(5) Å, b = 22.4926(6) Å, c = 12.4035(6) Å, β = 126.904(1) °, C2 space group, Z = 2. In the crystal, the V(IV) ions are in distorted octahedral geometry by coordinating to two oxygen atoms and one nitrogen atom of Schiff base ligand and two phenanthroline nitrogen atoms. The π∙∙∙π stacking interactions as well as C–H∙∙∙O hydrogen bonds were found to play an important role in the self-assembly of the complex molecules. The non-covalent interactions of the complex were further evaluated by Hirshfield Surface Analysis. Spectroscopic characterization of the complex by Infrared and UV-visible spectroscopic techniques is also reported.