Cluster synthesis. 40. New high-nuclearity platinum-ruthenium carbonyl cluster complexes. Synthesis and structural characterizations of Ru[sub 8]Pt[sub 2](CO)[sub 23]([mu][sub 3]-H)[sub 2], Ru[sub 7]Pt[sub 3](CO)[sub 22]([mu][sub 3]-H)[sub 2], and Ru[sub 8]Pt[sub 2](CO)[sub 21]([mu][sub 3]-[eta][sup 2]-CO)[sub 2](dppe)([mu]-H)[sub 2] with a new type of triply bridging CO ligand and the new layered cluster complex Ru[sub 6]Pt[sub 3](CO)[sub 21]([mu]-CO)([mu][sub 3]-H)[sub 2]
- Univ. of South Carolina, Columbia (United States)
The reaction of Ru[sub 4]Pt[sub 2](CO)[sub 18] with Ru[sub 4](CO)[sub 13]([mu]-H)[sub 2] at 97[degrees]C yielded the new decanuclear platinum-ruthenium carbonyl cluster complex Ru[sub 8]Pt[sub 2](CO)[sub 23]([mu][sub 3]-H)[sub 2] 1 (22%). In a similar manner the reaction of Ru[sub 4]Pt[sub 2](CO)[sub 18] with Ru[sub 3]Pt(CO)[sub 10](COD)([mu]-H)[sub 2], 2, in 25% yield. Both compounds were characterized by IR, [sup 1]H NMR, and single-crystal X-ray diffraction analyses, and both were bound to consist of similar edge-fused bioctahedral clusters with platinum atoms along the edge-sharing sites. There are strong metal-metal bonds between the apices of the adjacent octahedra. Both compounds are electron deficient, and one of the apical-apical Ru-Ru bonds is unusually short, 2.580 (2) [Angstrom] in 1 and 2.593 (5) [Angstrom] in 2. The hydrides are triply bridging ligands, and these were located and refined crystallographically in 1. The reaction of 1 with 1,2-bis(diphenylphosphino)ethane, dppe, yielded the adduct Ru[sub 8]Pt[sub 2](CO)[sub 21]([mu][sub 3]-CO)[sub 2](dppe)([mu]-H)[sub 2], 3, in 12% yield, which was shown to consist of a face-shared bioctahedral cluster of seven ruthenium and two platinum atoms with a ruthenium spike containing the dppe ligand extending from one triruthenium face. Two novel dihapto-triply bridging carbonyl ligands were found to bridge to the ruthenium spike. 1 and 2 both react with CO at 25[degrees]C, but only the product obtained from the reaction of 2, Ru[sub 6]Pt[sub 3](CO)[sub 21]([mu]-CO)([mu][sub 3]-H)[sub 2], 4, (55% yields), could be fully characterized. It was shown to contain a cluster of nine metal atoms arranged into trinuclear layers of pure ruthenium and pure platinum. The two triply bridging hydride ligands were located and refined crystallographically. 23 refs., 4 figs., 13 tabs.
- OSTI ID:
- 6486832
- Journal Information:
- Organometallics; (United States), Journal Name: Organometallics; (United States) Vol. 11:12; ISSN 0276-7333; ISSN ORGND7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ALKANES
CARBONYLS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
COHERENT SCATTERING
COMPLEXES
CRYSTAL STRUCTURE
DIFFRACTION
ETHANE
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
LAYERS
MAGNETIC RESONANCE
MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
PHOSPHINES
PHOSPHORUS COMPOUNDS
PLATINUM COMPLEXES
RESONANCE
RUTHENIUM COMPLEXES
SCATTERING
SPECTROSCOPY
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
X-RAY DIFFRACTION
YIELDS