Stereochemistry of mixed thiolate and ditertiary phosphine cobalt(II) complexes. Crystal structures of [Co{Ph2P(CH2)3PPh2}(SPh)2] and [Co{Ph2PCH2CH2P(Ph)CH2CH2PPh2}(SPh)2]

Abstract

The complexes [Co(dppp)(SPh)₂][dppp = 1,3-bis(diphenylphosphino)propane] and [Co(bdpp)(SPh)₂][bdpp = bis(2-diphenylphosphinoethyl)phenylphosphine] were prepared in good yields by treating Co(dppp)Cl₂ with NaSPh and elemental selenium in dimethylformamide and by treating CoCl₂·6H₂O and bdpp in acetonitrile with NaSPh, respectively. The complex [Co(dppp)(SPh)₂] crystallizes in the triclinic space group P, with a= 9.665(2), b= 10.075(1), c= 18.288(2)Å, α= 102.41(1), β= 93.89(1), γ= 92.40(1)° and Z= 2, whereas the complex [Co(bdpp)(SPh)₂] is monoclinic, space group Cc, with a= 16.374(2), b= 26.033(3), c= 10.873(5)Å, β= 117.49(2)° and Z= 4.