First Synthesis and Structural Characterization of Neutral Chelated syn-Facial Bimetallic (η5-Cyclohexadienyl)benzylidene Complexes from Tetracarbonyl[2-{(η6-phenyl)tricarbonylchromium(0)-ĸC2′}pyridine-ĸN]manganese(I) Derivatives
✍ Scribed by Jean-Pierre Djukic; Aline Maisse; Michel Pfeffer; Karl Heinz Dötz; Martin Nieger
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 371 KB
- Volume
- 1998
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Reaction of tetracarbonyl[2-{(η 6 -phenyl)tricarbonylchro-quinoline, 2b and 2c, with PhLi and subsequently with MeOSO 2 CF 3 affords deep purple crystalline products 4b and mium-κC 2Ј }pyridine-κN]manganese(I), 2a, with phenyllithium quantitatively affords an acylmanganese anion 3a 4c that have been structurally characterized by X-ray diffraction analyses. The molecular structures of 4b and 4c that can be isolated and spectroscopically characterized. Insitu O-alkylation of the latter anion by means of MeOSO 2 CF 3 display, among other features, an overall helical shape with a pronounced π-stacking of the aromatic groups and a weak at low temperature, yields a new neutral syn-facial heterobimetallic analog 4a of (η 5 -cyclohexadienyl)-interaction between the chromium and the manganese centered units. benzylidene complexes. The treatment of bimetallic carbonyl complexes of 3-methyl, 2-phenyl-pyridine and 2-phenyl-