560071-91-2Relevant academic research and scientific papers
The first phosphite complex of a metalloporphyrin
Munro, Orde Q.,Camp, Greville L.
, p. m132-m135 (2007/10/03)
(Diphenyl phosphite-κO)(5,10,15,20-tetraphenylporphyrinato-κ4N)mang anese(III) hexafluoroantimonate(V), [Mn(C44H28-N4)(C12H11O 3P)](SbF6), is the first example of a structurally characterized diaryl or dialkyl phosphite complex of a metal-porphyrin ion. The axial phosphite ligand binds to the MnIII ion via the P=O O atom, affording a nominally five-coordinate complex with an Mn-O distance of 2.120 (4) A. The mean porphyrin Mn-N distance is 2.000 (4) A and the MnIII ion is displaced from the 24-atom porphyrin mean plane by 0.1548 (13) A towards the axial O atom. The porphyrin adopts a marked saddle conformation, with a small domed component. The saddle distortion of the porphyrin ligand reflects the tight back-to-back dimers formed in the lattice by pairs of neighboring cations. The 'non-covalent' dimers in the lattice exhibit an unusual (weak) η2-type coordination of a pyrrole C=C bond from a neighboring molecule, with MnIII...C distances of 3.697 (5) and 3.537 (5) A.
