Tertiary Phosphine Complexes of Iron Porphyrins: Synthesis, Molecular Stereochemistry, and Crystal Structure of Bis(dimethylphenylphosphine)-(meso-5,10,15,20-tetraphenylporphyrinato)iron(II)

Article abstract of DOI:10.1039/DT9880002615

The bonding properties of phosphines (PR3=PMe3, PMe2Ph, PMePh2, and PH2Ph) in iron(II) porphyrin complexes have been studied.The six-co-ordinate complexes II(tpp)(PR3)2> and II(tpp)(PMe3)(mim)>(tpp=meso-5,10,15,20-tetraphenylporphyrinate, mim=N-methylimidazole) have been prepared.The (1)H and (31)P n.m.r. properties of these compounds are discussed in comparison with previous studies on the binding of phosphines to haemoglobins.Carbon monoxide binding to 3)2> has also been studied and followed by i.r. spectroscopy.The crystal structure of has been determined by three-dimensional, single crystal X-ray diffraction methods.The complex crystallizes in the triclinic space group <*> in a cell of dimensions a=10.305(5), b=11.149(7), c=12.839(5) Angstroem, α=65.67(4), β=63.34(3), γ=79.25(4) deg , and Z=1.Refinement based on 3 968 observed δ(I)> diffractometer data converged at R=0.030 and R'=0.032.The Fe-P distance is 2.284(1) Angstroem and the average Fe-N distance 2.000(1) Angstroem.The porphyrin core is planar and all bond parameters in the core are consistent with a low-spin iron(II) complex.

Full text of DOI:10.1039/DT9880002615

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