A Cu-II complex with an carbamoylcyanonitro-somethanide ligand formed in situ by the nucleophilic addition of water to dicyanonitroso-methanide: structure, spectral and magnetic properties

作者：Potocnak Ivan^*; Bukrynov Oleksandr; Kliuikov Andrii; Cizmar Erik; Vitushkina Svitlana; Vahovska Lucia; Dusek Michal

来源：Acta Crystallographica Section C-Structural Chemistry, 2018, 74(5): 584-+.

DOI：10.1107/S2053229618005697

• carbamoylcyanonitrosomethanide
• copper(II)
• nucleophilic addition
• crystal structure
• magnetic properties
• EPR spectrum
• IR spectrum

The complex (2,2'-biquinoline-kappa(2) N,N')(carbamoylcyanonitrosomethanide-kappa N-2,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 Cu II 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 Cu II atom in a bidendate chelating manner, and a chloride ligand, resulting in a distorted tetragonal pyramidal coordination of Cu II. 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 smallWeiss temperature Theta = -0.32 K and high anisotropy of the g tensor (g(x) = 2.036, g(y) = 2.120 and g(z) = 2.205).

• 出版日期2018-5