The mol-ecular structure of the title compound, trans-[Cu(C2H)Cl(C26H24P2)2], consists of an Ru(II) cation, located on an inversion centre, in an octa-hedral environment defined by two chelating phosphines, one acetyl-ide and one chloride ligand. The -C CH and the chlorine ligands are disordered over two equivalent positions (0.5 occupancy each). The coordination geometry is distorted octa-hedral, with the -C CH fragment and the Cl ligand in trans positions. The four P atoms occupy the equatorial plane of the octa-hedron and the chloride and acetyl-ide ligands the axial positions.