Iron-osmium bonding in clusters containing ferrocene fragments

Preparation and characterization of the osmium cluster complexes H2Os3(CO)8L(EtFcPCMe) (L = CO or PEt2Fc) and H2Os3(CO)8[(η-C5H3PEt2)Fe(η-C5H4)]

“…The Fe+Os bond length, 2.826(2) A, is similar to that found for the other compounds 9 (20,25). The C(l):Os(3) and C(6)-Os(1) distances at 2.168(8) and 2.08(1) A, respectively, are typical of carbon-osmium u-bonds, but there is probably also some interaction between C(1) and Os (1) The mass spectrum of 10 suggests the loss of two carbonyls from the parent complex and the analytical data are consistent with this formulation.…”

“…The structure of 9e is very similar to those of 9a-d previously described (20,25). It consists of a triangular array of three osmium atoms with one face capped by an axial phosphine and a doubly metalated ferrocenyl moiety.…”

Crystal and molecular structures of two triosmium carbonyl cluster complexes containing ortho-metalated phenylphosphines (μ-H)Os3(CO)8L[PFcPh(C6H4)] (L = PFcPh2 or CO)

“…and formation of an Fe-0s bond, has been fully characterized and was described previously (10). A second product, 6, has now been isolated in moderate yield.…”

“…The pyrolysis of 8 has been described previously (10). Compound 6 was eluted as the sixth band in -15% yield.…”

“…Deeming et al were able to isolate and though not structurally characterized (1). We have been interested in studying ferrocenyl phosphines with the objective of obtaining ortho-metalated ferrocenyl moieties and from the pyrolysis of OS,(CO),,(PFCP~~)~ we were able structurally characterize two intermediates in the transfor- 3, containing an ortho-rnetalated phenyl group which is also double metalation has occurred (10). However, given the q2-bound to the third osmium atom.…”