The crystal structure of mono- and di-nuclear copper(I) complexes with substituted triphenylphosphine ligands

The structures of mono- and µ2-halogen binuclear Cu(I) complexes with substituted tri-tolylphosphine, were determined by X-ray diffraction, showing a tetrahedral geometry for the bromine monometallic complexes, while the µ2-Cl binuclear complexes exhibit both a trigonal-planar or a mixture of trigonal-planar and tetrahedral geometries. The NMR results suggest the presence of equilibria in solution for the bimetallic complexes.