METAL CYANONITROSYL COMPLEXES - SYNTHESIS, MAGNETIC, THERMAL AND SPECTRAL STUDIES OF SOME NOVEL MIXED-LIGAND CYANONITROSYL (MNNO)(6) COMPLEXES OF MANGANESE(I) WITH POTENTIALLY MONODENTATE AND BIDENTATE ANILINEDERIVATIVES

Novel mixed-ligand cyanonitrosyl {MnNO}(6) complexes of manganese(I), formed by the interaction of pentacyanonitrosyl-manganate(I) anion, [M n(NO)(CN)(5)](3-), with potentially bidentate aniline derivatives, viz ., o-phenylenediamine (o-PDA, I), m-phenylenediamine (m-PDA, II), and potentially mondentate aniline derivatives, o-anisidine (o-ANS, III), m-anisidine (m-ANS, IV), p-anisidine (o-ANS, V), o-phenetidine (o-PD, VI) ard m-phenetidine (m-PD, VII), are described. The resulting mixed- ligand complexes, which have been characterized by analytical data, el ectrical conductances, magnetic measurements, electronic spectra, ther mogravimetric analyses and infrared spectral studies, have the composi tions [Mn(NO)(CN)(2)(o-PDA)(H2O)], [Mn(NO)(CN)(2)(m-PDA)(H2O)(2)] or [ Mn(NO)(CN)(2)(L)(2)(H2O)] (where L = III, IV, V, VI or VII). Suitable octahedral structures have been proposed for the complexes. Mangancse( I) has a low-spin {MnNO}(6) electron configuration in these complexes.