Synthesis, characterization, and X-ray crystal structure of the manganese(III) complex Mn(Sal₂hn)(CH₃OH)(N₃) [Sal₂hn = N,N′-bis(salicylidene)-1,2-hexanediamine]

Abstract

The new manganese(III) complex, Mn(Sal₂hn)(CH₃OH)(N₃), where Sal₂hn = N,N′-bis(salicylidene)-1,2-hexanediamine, was prepared from a reaction mixture containing Sal₂hn, MnCl₂ · 2H₂O, and NaN₃ (2: 1: 8 molar ratio) in methanol and characterized using elemental analysis, FT-IR spectroscopy, and X-ray single-crystal diffraction. In the title complex, the Mn(III) center is in a distorted octahedral coordination geometry with the basal plane formed by the N₂O₂ donors of the tetradentate Schiff base dianion; the two phenolate O atoms and the two imine N atoms are each mutually in the cis position. The azide ion and the O atom of the methanol molecule occupy the other two positions of the octahedron. The hydrogen bond O(3)-H(3O)⋯N(5) links the mononuclear Mn(Sal₂hn)(CH₃OH)(N₃) units into a 1D chain extended along the x axis. The crystal structure is further stabilized by C(7)-H(7)⋯N(3) and C(16)-H(16)⋯N(5) hydrogen bonds.