The structure determination of the title compound, 23),9,11,13,15,17,1
9-undecaenediido-N,N',N'',N'''} bis(trimethyl phosphito-P)iron(II), [F
e(C48H36N4)(C3H9O3P)2], is the first example of a structural study on
a model phosphito ferrous porphyrin derivative. The complex crystalliz
es in a centrosymmetric form. The metal-phosphorus bond lengths [2.255
(2) angstrom] are shorter than those observed in the analogous iron(I
I) complex containing dimethylphenylphosphine ligands [2.284 (1) angst
rom].