Molecular structure of [CpRu(PPh3)2(tht)]BF4, tht=tetrahydrothiophene

The title compound [CpRu(PPh3)2(tht)]BF4,1, tht=tetrahydrothiophene, is obtained by the reaction of CpRu(PPh3)2Cl, tht and AgBF4 in CH2Cl2 solution. Yellow crystals of [CpRu(PPh3)2(tht)]BF4 were grown by the slow diffusion of pentane into a CH2Cl2 solution of1 and have been studied by X-ray crystallography: space group is P21/n,a=9.507(2),b=18.336(3),c=22.372(6) A, β=94.28(2)°,V=3889(1) A3,Z=4. The tht ligand binds to the Ru atom through the sulfur atom at a distance of 2.395(2) A. The tht ring is in the puckered configuration.