Synthesis, crystal structure, and characterization of two new end-to-end 1D pseudohalide bridged manganese(III) complexes

Abstract

Two new manganese(III) Schiff base complexes MnL₂N₃ (1) and MnL₂NCS (2) where HL is 4-bromo-2-[(Z)-{[2-(thiophene-2-yl)ethyl]imino}methyl]phenol) were synthesized and characterized by UV–Vis. absorption spectra, FT-IR, TGA Analyses, and single-crystal X-ray diffraction technique. Structural studies reveal that the metal sites in complexes 1–2 are six-coordinated by two phenoxy oxygen atoms, two imine nitrogen atoms of two moles of Schiff base ligand, HL, and two nitrogen atoms from the azide or one nitrogen atom and one sulphur atom from thiocyanate ligands, respectively. The geometry around the metal center is twisted octahedral geometry with a MnN₄O₂ (for 1) and MnN₃O₂S (for 2) chromophore. Hirshfeld surfaces associated with 2D fingerprint plots have been used to analyze intermolecular interactions in crystal packing. Crystal packing of both complexes shows the interchain π⋯π stacking interactions between one-dimensional polymeric chains.