Hydrogen-Bond Influenced Synthesis and Crystal Structures of (4-Chloro-2-[(2-dimethylaminoethylimino)methyl] phenolato)dioxovanadium(V) and Bis(2-[(2-aminoethylimino)methyl]-4-bromophenolato) dioxovanadium(V)

A mononuclear vanadium complex, [VO2La] (1) (La = 4-chloro- 2-[(2-dimethylaminoethylimino)methyl]phenolate), and a binuclear vanadium complex, [VO2Lb]2 (2) (Lb = 2-[(2-aminoethyl imino)methyl]-4-bromophenolate), were prepared and characterized by physical chemical methods (IR and UV-Vis spectra, elemental analysis), and single crystal X-ray diffraction. The V coordinate center in (1) is ligated by three NNO donor atoms of the Schiff base ligand La, and two oxo groups, generating pyramidal coordination. Each V coordinate center in (2) is ligated by three NNO donor atoms of the Schiff base ligand Lb, and three oxo groups, generating octahedral coordination. Close examination on the relationship between structures of Schiff base ligands and the final complexes, hydrogen bonds are the substantial influence factors in the self-assembly processes.