Synthesis. Magnetic and Spectral Studies of Some Novel Mixed-Ligand Cyanonitrosyl {CrNO} ⁵ Complexes of Chromium(I) with Potentially Bidentate Quinoline Derivatives

Abstract

Some novel mixed-ligand cyanonitrosyl {CrNO} ⁵ complexes of chromium(I), formed by the interaction of potassium penta-cyanonitrosylchroroate(I) monohydrate, K₃[Cr(NO)(CN)₅].H₂O, with potentially bidentate quinoline derivative, viz., 2-hydrazinoquino-line, 3-hydrazinoquinoline, 2-quinolinecarboxylic acid, 3-quinoline-carboxylic acid, 4-quinolinecarboxylic acid, 2-quinolinecarboxalde-hyde, 3-quinolinecarboxaldehyde, 4-quinolinecarboxaldehyde, and methyl 3-isoquinolinecarboxylate are described. The products, which have been characterized by elemental analyses, electrical conductances, magnetic measurements, electron spin resonance and infrared spectral studies, have the general formula [Cr(NO)(CN) ₂ (L) ₂ (H₂O)], where L = the said ligands. Octahedral structure has been proposed for the complexes. Chromium(I) has a low-spin {crNO} ⁵ electron configuration in these complexes.