A CuII complex with an carbamoylcyanonitrosomethanide ligand formed in situ by the nucleophilic addition of water to dicyanonitrosomethanide: structure, spectral and magnetic properties

The complex (2,2′-bi­quinoline-κ2N,N′)(carbamoyl­cyano­nitro­somethanide-κ2N,O)chlorido­copper(II) aceto­nitrile monosolvate, [Cu(C3H2N3O2)Cl(C18H12N2)]·CH3CN or [Cu(ccnm)Cl(biq)]·acn (acn is aceto­nitrile, biq is 2,2′-bi­quinoline and ccnm is carbamoyl­cyano­nitro­somethanide), (I), was prepared as a result of nucleophilic addition of water to the di­cyano­nitro­somethanide ion in the presence of CuII and biq. IR spectroscopy confirmed the presence of ccnm, biq and acn in (I). The solid-state structure consists of the neutral complex containing ccnm and biq ligands, coordinated to the CuII atom in a bidendate chelating manner, and a chloride ligand, resulting in a distorted tetra­gonal pyramidal coordination of CuII. The asymmetric unit is supplemented by one mol­ecule of solvated acn which, along with the nitrile group of ccnm, serves as an acceptor in inter­molecular hydrogen bonding, creating infinite chains along the b axis. Magnetic measurements revealed a paramagnetic behaviour with a very small Weiss temperature Θ = −0.32 K and high anisotropy of the g tensor (gx = 2.036, gy = 2.120 and gz = 2.205).