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

A vanadium(IV) Schiff base complex derived from salicylaldehyde and L-alanine with phenanthroline as co-ligand viz. [(VO)-O-IV(salala)(phen)]1.66H(2)O (where salala = Schiff base derived from salicylaldehyde and L-alanine, phen = 1,10-phenanthroline) have been 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] & Aring;, b = 22.4926 [6] & Aring;, c = 12.4035 [6] & Aring;, beta = 126.904 [1]degrees, C2 space group, Z = 2. In the crystal, the V(IV) ions are in distorted octahedral geometry, coordinated to two oxygen atoms and one nitrogen atom of Schiff base ligand and two phenanthroline nitrogen atoms. The pi<middle dot><middle dot><middle dot>pi stacking interactions as well as C-H<middle dot><middle dot><middle dot>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 Hirshfeld Surface Analysis. Spectroscopic characterization of the complex by Infrared and UV-visible spectroscopic techniques is also reported. [GRAPHICS]