The title compound, pyridyl)-3-butenolato-N,O:N',O]bis[iodocopper(II)]
bis(acetonitrile) solvate, was obtained from copper(I) iodide and the
neutral ligand on reaction with oxygen. The olefinic function is unaf
fected by the oxidation. The coordination at each Cu atom is trigonal
bipyramidal and the coordination polyhedra share a common edge, which
is the O ... O diagonal of the central Cu2O2 ring.