Low-dimensional compounds containing cyanido groups. Part XXXI. First simultaneous nucleophilic addition of water and ethanol to dicyanonitrosomethanide anions in the presence of Co(II)

Abstract

Molecular [CoIII(acnm)(bpy)(cenm)]·H2O (1) complex (acnm=amidocarbonyl(cyano)nitrosomethanide; bpy=2,2′-bipyridine and cenm=cyano[imino(ethoxy)methyl]nitrosomethanide) was prepared as a result of simultaneous nucleophilic addition of water and ethanol to dicyanonitrosomethanide ions in the presence of Co(II) and bpy, and represents the first example of compound comprising both acnm and cenm ligands. Infrared spectroscopy confirmed the presence of acnm, bpy, cenm and water molecules in 1. Its solid state structure consists of neutral complexes containing acnm, cenm and bpy ligands bidentate chelate coordinated to Co(III) atom to form a distorted octahedron. Asymmetric unit is supplemented by one molecule of crystal water which along with amido and imine groups serves as donor in intermolecular hydrogen bonds creating infinite wave-like 2D sheets in the bc plane. One- and two-dimensional NMR experiments confirmed the structure of the complex unit in DMSO solution. Results of UV–VIS spectroscopy and magnetic measurements are consistent with the presence of Co(III) atom and therefore diamagnetic character of 1 and thermal analysis was used to follow its decomposition.