Reactions of 2-(1-carboxyl-2-hydroxyphenyl)thiazolidine with chromium(III) salts leading to newer synthesis of chromium(III) complexes

Abstract

Reactions of 2-(L-carboxyl-2-hydroxyphenyl)thiazolidine with different chromium(III) salts [CrCl₃ · 6H₂O, K₃[Cr(SCN)₆], NH₄[Cr(NH₃)₂(SCN)₄] · H₂O, [Cr(urea)₆]Cl₃ · 3H₂O and [Cr(CH₃COO)₂H₂O]₂] under varied reaction conditions afforded many new mixed-ligand chromium(III) complexes. The ligand is a tridentate dibasic NSO donor except for complexes 1 and 4 where two moles of the ligand are present for each molecule of complex, one functioning as a dibasic tridentate (NSO) and the other as a monobasic bidentate (NS) (phenolic OH and carboxylic COOH groups remaining uncoordinated). The complexes have been characterized by elemental analyses, magnetic susceptibilities, molar conductances, molecular weights and spectroscopic (IR, Uv-vis) data. The ligand field parameters and NSH Hamiltonian parameters suggest tetragonal geometries of the complexes.

Keywords:

• 3-Formylsalicylic acid
• Schiff base
• Thiazolidine
• Chromium(III) compounds
• NSH parameters

Acknowledgements

Financial help from the University of Kalyani in the form of Teachers’ Research Grant is gratefully acknowledged. We are thankful to the Regional Sophisticated Instrumentation Centre, Central Drug Research Institute, Lucknow for elemental analyses and some spectroscopic measurements. Facilities provided by the Department of Science and Technology, Govt. of India, New Delhi under Funds for Improvement in Science and Technology are gratefully acknowledged.