Cluster build-up reactions using di-gold cationic fragments: Synthesis andstructural characterization of [Os-7(CO)(19)(Au(2)dppm)]

Citation
Z. Ahkter et al., Cluster build-up reactions using di-gold cationic fragments: Synthesis andstructural characterization of [Os-7(CO)(19)(Au(2)dppm)], J CLUST SCI, 11(1), 2000, pp. 217-226
Citations number
19
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF CLUSTER SCIENCE
ISSN journal
10407278 → ACNP
Volume
11
Issue
1
Year of publication
2000
Pages
217 - 226
Database
ISI
SICI code
1040-7278(200003)11:1<217:CBRUDC>2.0.ZU;2-S
Abstract
The reaction of the di-gold cation [Au-2(dppx)](2+) with the heptanuclear c luster dianion [Os-7(CO)(20)](2-) aifords the mixed metal cluster [Os-7(CO) (20){Au-2(dppx)}] (x=m (1), e (2), b (3)). On standing, in solution, this c omplex under goes decarbonylation to give the cluster [Os-7(CO)(19){Au-2(dp px)}] (x = m (4), e (5), b (6)). The complexes have been characterised spec troscopically, and an X-ray structure determination of the dppm derivative shows that it contains a metal core based on an Os-7 edge-bridged bicapped tetrahedron with the two mu(3)-Au atoms capping adjacent triangular Os-3 fa ces of the central tetrahedron. In an analogous reaction, the carbido anion [Os-7(H)C(CO)(19)](-) affords the neutral cluster [Os7C(CO)(19){Au-2(dppm) }] (7) when treated with [Au-2(dppm)](2+) in the presence of base.