Addition of methanol to copper(II)-coordinated dicyanonitrosomethanide: (3-Amino-3-methoxy-2-nitrosoacrylonitrilato-N-2, N-3)(bipyridine-N,N')(dicyanamido-N)copper(II)

A new ligand formation was observed in the title complex, [CU(C4H4N3O2){N(CN)(2)}(C10H8N2)], as a result of the nucleophilic addition reaction between methanol and dicyanonitrosomethanide in the inner coordination sphere of a Cu-II atom. This new ligand, 3-amino-3-methoxy-2-nitrosoacrylonitrilate (add), [NHC(OMe)C(CN)NO](-), is coordinated as a chelate, forming a five-membered metallocycle with Cu-II. The distorted tetragonal-pyramidal coordination is completed by one chelate-coordinated molecule of 2,2'-bipyridine (bipy) and one end-coordinated dicyanamide anion, [N(CN)(2)](-). The four N atoms of the two metallocycles form the base and a fifth N atom, from the dicyanamide anion, forms the apex of the pyramid, creating a {CuN5} chromophore. The structure of [Cu(add)(bipy){N(CN)(2)}] consists of discrete molecules.