Imidazolate bridged polynuclear rhodium(I) complexes. X-ray structure of [Rh(2-Meimidazolate)(CO)2]4

  1. Tiripicchio, A. 2
  2. Camellini, M.T. 2
  3. Uson, R. 1
  4. Oro, L.A. 1
  5. Ciriano, M.A. 1
  6. Pinillos, M.T. 1
  1. 1 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

  2. 2 University of Parma
    info

    University of Parma

    Parma, Italia

    ROR https://ror.org/02k7wn190

Revista:
Journal of Organometallic Chemistry

ISSN: 0022-328X

Año de publicación: 1982

Volumen: 224

Número: 2

Páginas: 207-216

Tipo: Artículo

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Otras publicaciones en: Journal of Organometallic Chemistry

Resumen

The synthesis and properties of polynuclear complexes of general formulae [M(RIm)(diolefin)x, [M(RIm)(CO)2]x and [M(RIm)(CO)L]x (M Rh, Ir; RIm imidazolate, 2-methylimidazolate, 2-benzylbenzimidazolate; L PPh3 or P(OPh)3) are reported. The crystal structure of the novel complex [Rh(2-MeIm)-(CO)2]4 (2-MeIm 2-methylimidazolate) has been determined by X-ray methods. The crystals are orthorhombic, space group P212121, with Z 4 in a unit cell of dimensions a 19.427(12), b 13.419(8), c 12.346(9) Å. The structure has been solved by combined Patterson and direct methods and refined by full-matrix least-squares to R 0.043 for 937 independent observed reflections. It consists of discrete tetrameric complexes in which each Rh atom is in a nearly cis square planar arrangement, bonded to two carbon atoms of carbonyl groups and to two nitrogen atoms of two 2-methylimidazolate ligands, each of which, acting as an exo-bidentate ligand, bridging two metal atoms, so that the four bridging 2-MeIm ligands and the four Rh atoms form a multiatomic ring. © 1982.