The first metalloporphyrin dimer linked by a bridging phenylenedicarbene ligand
摘要:
In the first bis[ruthenium(II)-porphyrin]-dicarbene complex, mu-[1,4-phenylenebis(phenylmethylidene-kappa C)] bis[(ethanol-kappa O)( 5,10,15,20-tetra-p-tolylporphyrinato-kappa N-4) ruthenium(II)] 1,2-dichloroethane trisolvate, [Ru-2(C20H14)(C48H36N4)(2)(C2H6O) 2](.)3C(2)H(4)Cl(2), an inversion center is located at the center of the mu-phenylene group, leading to a parallel arrangement for the pair of porphyrin ring systems. The bond lengths and angles compare favourably with literature values for ruthenium-porphyrin-monocarbene complexes; the Ru=C(carbene) bond length and the C(phenyl)-C(carbene) C(phenylene) angle are 1.865 (3) angstrom and 112.3 (3)degrees, respectively. The Ru-II ion is displaced out of the C20N4 porphyrin least-squares plane ( by 0.2373 angstrom) toward the bridging ligand of the C-i-symmetry dimer. The porphyrin ring systems of the dimer thus exhibit mildly domed conformations.