SYNTHESIS AND CRYSTAL-STRUCTURE OF THE CO ORDINATIVELY UNSATURATED COMPLEX [FERU(CO)(5)(MU-PBU(2)(T))(2)]

[(RU(CO)(3)Cl-2)(2)] reacts with the in situ prepared reagent Li-2[Fe( CO)(3)(PBu(2)(t))(2)] to give the new heterobinuclear complex [FeRu(CO )(5)(mu-PBu(2)(t))(2)] (1). Crystals of 1 are isomorphous to those of the known compound [Fe-2(CO)(5)(mu-PBu(2)(t))(2)] (2) and crystallize in the triclinic space group P ($) over bar 1 with a = 867,5(1), b = 1 181,0(2), c = 1373,1(2) pm; alpha = 76,64(1), beta = 79,72(1) and gamm a = 76,48(1)degrees. A double bond between the two metal atoms conclud ed for 2 from the results of EHMO calculations is also proposed for 1 (Fe=Ru: 259,8(1) pm).