The title complex crystallizes in the monoclinic space group 21/n with unit-cell dimensions a = 14.334 (2), b = 29.231 4), c = 24.626(3) Å, β = 94.61(3)°, and Z = 4. The structure has been determined by conventional methods from X-ray single-crystal counter data and refined by least-squares calculations to R 0.061 for 7 286 significant diffraction intensities. The [Rh13H2(CO)24]3- anion contains a polyhedron of rhodium atoms consisting of a fragment of hexagonal close packing (D3h symmetry). The mean Rh-Rh distance is 2.794 Å. Twelve of the CO ligands are terminally bonded and 12 symmetrically edge bridging on half of the polyhedron edges; the idealized overall molecular symmetry is Cs. On the basis of the Rh-Rh distances and of the holes left by the ligands on the cluster surface, the hydride atoms have been located in two semi-octahedral cavities of the cluster.
|Titolo:||High nuclearity carbonyl clusters of rhodium. Part 1. Crystallographic characterization of dodeca-μ-carbonyl-dodecacarbonyldihydrido-polyhedro-tridecarhodate(3-) in its benzyltriphenylphosphonium salt|
CIANI, GIANFRANCO MARIA (Secondo)
SIRONI, ANGELO AGOSTINO DANIELE (Ultimo)
|Settore Scientifico Disciplinare:||Settore CHIM/03 - Chimica Generale e Inorganica|
|Data di pubblicazione:||1979|
|Digital Object Identifier (DOI):||10.1039/DT9790000978|
|Appare nelle tipologie:||01 - Articolo su periodico|