ISSN:
1434-1948
Keywords:
Chromium
;
Manganese
;
Nucleophilic additions
;
Metal-metal interactions
;
Helical structure
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Reaction of tetracarbonyl[2-{(η6-phenyl)tricarbonylchromium-ĸC2′}pyridine-ĸN]manganese(I), 2a, with phenyllithium quantitatively affords an acylmanganese anion 3a that can be isolated and spectroscopically characterized. In-situ O-alkylation of the latter anion by means of MeOSO2CF3 at low temperature, yields a new neutral syn-facial heterobimetallic analog 4a of (η5-cyclohexadienyl)benzylidene complexes. The treatment of bimetallic carbonyl complexes of 3-methyl, 2-phenyl-pyridine and 2-phenyl-quinoline, 2b and 2c, with PhLi and subsequently with MeOSO2CF3 affords deep purple crystalline products 4b and 4c that have been structurally characterized by X-ray diffraction analyses. The molecular structures of 4b and 4c display, among other features, an overall helical shape with a pronounced π-stacking of the aromatic groups and a weak interaction between the chromium and the manganese centeredunits.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
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