Abstract
The effect of different solvents on synthesis and recrystallization of Ni2+ complex with the tetradentate Schiff base was studied. The polar protic (MeOH and EtOH) and aprotic (ACN, DMF and THF) solvents have been used. The synthesis and recrystallization from these solvents allow obtaining seven different solvates or solvent free compounds. The products were characterized using UV–vis and FITR spectroscopy, X-ray diffraction analysis and thermogravimetry. Only in the case of DMF, the synthesis and recrystallization lead to formation of the same compound. The remaining pairs of complexes differ in their composition or/and structure. In almost all compounds the coordination environment around Ni2+ centre consists of two nitrogen and two oxygen atoms of Schiff bases ligand which forms the distorted square planar geometry. The compound synthesised form THF shows significant paramagnetism which suggests that the coordination geometry around metal centre is a distorted octahedral.
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