Synthesis and characterizaton of some novel mixed-ligand cyanonitrosyl {MnNO}⁶ complexes of manganese (I) with biologically active oxygen donor 2- or 3-pyrazoline- 5-one derivatives

Abstract

A series of novel mixed-ligand cyanonitrosyl complexes of Mn(I) have been synthesized by the reaction of pentacyanonitrosylmanganate( I) anion ([Mn(NO)(CN)₅]^3-) with 2- or 3-pyrazoline-5-one derivatives. The products, which have been characterized by elemental analysis, molar conductance measurements, magnetic susceptibility measurements, thermogravimetric analysis, electronic and IR spectral studies, have the general formula [Mn(NO)(CN)₂(L)₂ (H₂O)] (where L= 2- or 3-pyrazoline- 5-one are derivatives. Octahedral configuration with low-spin {Mn(NO)}⁶species has been suggested for these complexes.