ISSN:
1434-1948
Keywords:
Carbene complexes
;
Carbonyl complexes
;
Diazoalkanes
;
Hydrido complexes
;
Ruthenium
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The five-coordinate compound [RuHCl(CO)(PiPr2Ph)2] (1), which was prepared from RuCl3· 3 H2O and PiPr2Ph in methanol in the presence of NEt3, reacts with CO and with diazoalkanes RCHN2 (R = Ph, H) to give the six-coordinate complexes [RuHCl(CO)2(PiPr2Ph)2] (4) and [RuHCl(CO)(=CHR)(PiPr2Ph)2] (5, 6), respectively. If the reaction of 1 with CH2N2, which at -78 °C affords 6, is carried out at room temperature, the ionic compound [MePiPr2Ph][RuHCl2(CO)(PiPr2Ph)2] (7) is formed. The corresponding PPN salt was obtained from 1 and [PPN]Cl. The X-ray crystal structure analysis of 7 revealed, that the anionic species [RuHCl2(CO)(PiPr2Ph)2]- contains the chloro ligands in cis and the phosphanes in trans disposition. The Ru=CH2 bond of compound 6 is quite labile and, therefore, the CH2 unit is easily displaced by CO or pyridine. From 1 and pyridine, an isomeric mixture of [RuHCl(CO)(py)(PiPr2Ph)2] (9a, b) is formed. Treatment of 1 with HC≡CR (R = H, Ph) yields the five-coordinate vinylruthenium(II) complexes [Ru(CH=CHR)Cl(CO)(PiPr2Ph)2] (12, 13) by insertion of the alkyne into the Ru-H bond. The preparation of [RuHX(CO)-(PiPr2Ph)2] (X = CF3CO2, I) is also reported.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
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