Models of the iron-only hydrogenase: Structural studies of chelating diphosphine complexes [Fe<sub>2</sub>(CO)<sub>4</sub>(µ-pdt)(κ<sup>2</sup>P,P′-diphosphine)]
作者:Fatima I. Adam、Graeme Hogarth、Idris Richards、Benjamin E. Sanchez
DOI:10.1039/b706123b
日期:——
Six chelating diphosphine complexes, [Fe2(CO)4(µ-pdt)(κ2P,Pâ²-diphosphine)], have been crystallographically characterised allowing differences between basalâapical and dibasal conformations to be analysed.
Synthesis, crystal structure and protonation of the asymmetric iron-only hydrogenase model [Fe2(CO)3(μ-pdt){μ,η2-Ph2PCH2CH2P(Ph)CH2CH2PPh2}] (pdt=SCH2CH2CH2S)
作者:Graeme Hogarth、Idris Richards
DOI:10.1016/j.inoche.2006.09.005
日期:2007.1
Heating [Fe-2(CO)(6)(mu-pdt)] (pdt = SCH2CH2CH2S) and bis(2-diphenylphosphinoethyl) phenylphosphine (triphos) in toluene gives [Fe-2(CO)(3)(mu-pdt)mu, eta(2)-Ph2PCH2CH2P(Ph)CH2CH2PPh2}], the major form of which has been characterised crystallographically. The complex is highly asymmetric; while one iron centre has the expected square-based pyramidal coordination environment, the second is nearer a trigonal bipyramid. In solution at room temperature, four isomers of the major form interconvert via two processes which can be frozen out at low temperature, while protonation affords a bridging hydride complex which appears to be static at all temperatures. (c) 2006 Elsevier B.V. All rights reserved.