ISSN:
1434-1948
Keywords:
Pyrazolato complexes
;
Dinuclear complexes
;
Ketonic carbonyls
;
Ruthenium
;
Osmium
;
Rhodium
;
Iridium
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The metal-metal bonded dicarbonyl compounds [(η6-p-cymene)M(μ-pz)2IrCl(CO)2](M-Ir) react stereospecifically with PPh3 to yield an enantiomeric pair of ketonic carbonyl compounds [(η6-p-cymene)M(μ-CO)(μ-pz)2IrCl(CO)(PPh3)] [M = Ru (1), Os (2)] in which the chloride ligand is trans to the bridging ketone group. However, the non metal-metal bonded isomers [(η6-p-cymene)MCl(μ-pz)2M′(CO)2], under similar conditions, eliminate CO forming the monosubstitution products [(η6-p-cymene)MCl(μ-pz)2M′(CO)(PPh3)] [M = Ru; M′ = Ir (3), Rh (4). M = Os; M′ = Rh (5)]. Removal of the chloride ligand in 1 affords [RuIr(η6-p-cymene)(CO)2(PPh3)(pz)2]BPh4 as two isomers, 6a,b. The related OsIr compound [(η6-p-cymene)Os(μ-CO)(μ-pz)2Ir(CO)(PPh3)]BPh4 (9) has been prepared from [(η6-p-cymene)Os(CO)(μ-pz)2Ir(CO)2]BPh4 (7) and PPh3. Again, the OsRh tricarbonyl related to 7 [(η6-p-cymene)Os(CO)(μ-pz)2Rh(CO)2]BPh4 (8) reacts differently with PPh3 affording [(η6-p-cymene)Os(CO)(μ-pz)2Rh(CO)(PPh3)]BPh4 (10).
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
