Dithioethers as ligands in pentamethylcyclopentadienylrhodium(III) and iridium(III) complexes. Crystal structures of [{(eta(5)-C5Me5)Rh}(2)(mu-Cl)(2){mu-(MeS)(2)CH2}](BF4)(2)center dot H2O and [(eta(5)-C5Me5)IrCl2{eta(1)-(PhS)(2)CH2}]