Mixed platinum-rhodium carbonyl clusters. Synthesis and chemical characterization of the [PtRh6(.mu.3-CO)3(.mu.-CO)5(CO)8]2- anion and x-ray crystal structure of its tetrapropylammonium salt
Articolo
Data di Pubblicazione:
1989
Citazione:
Mixed platinum-rhodium carbonyl clusters. Synthesis and chemical characterization of the [PtRh6(.mu.3-CO)3(.mu.-CO)5(CO)8]2- anion and x-ray crystal structure of its tetrapropylammonium salt / A. Fumagalli, S. Martinengo, D. Galli, A. Albinati, F. Ganazzoli. - In: INORGANIC CHEMISTRY. - ISSN 0020-1669. - 28:12(1989 Jul), pp. 2476-2479. [10.1021/ic00311a045]
Abstract:
The dianion [PtRh6(C0)16]~- has been obtained through several synthetic routes, particularly by redox condensation of [PtRh,(CO),,]-
and [Rh(CO)J. The product is unstable in solution, both under N2, where it slowly yields species of higher nuclearity,
and under CO, where it is fragmented in smaller clusters. The [N-n-Prp]*[PtRh,(C0),6] salt has been characterized by X-ray
diffraction. Crystal data: CaH~6N2016PtRh6, M, = 1633.41, monoclinic, space group C2/c (No. 15), a = 17.180 (2) A, b =
15.848 (2) A, c = 39.719 (4) A, j3 = 92.45 (3)O, Z = 8, R = 0.048, R, = 0.063. The metal skeleton of the dianion is an octahedron
of Rh atoms asymmetrically capped by a Pt atom. Three carbonyls out of 16 are triply bridging, five are edge bridging, and eight are terminal (two on a Rh atom of the capped face and one on each of the other metals). One of the two terminal carbonyls bound
to the unique rhodium is heavily distorted (Rh-C-0 = 158 (3)O) by a weak semibridging interaction with the Pt atom (Pt-C = 2.73 (3) A).
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Fumagalli, S. Martinengo, D. Galli, A. Albinati, F. Ganazzoli
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