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First Synthesis and Structural Characterization of Neutral Chelated syn ‐Facial Bimetallic (η 5 ‐Cyclohexadienyl)benzylidene Complexes from Tetracarbonyl[2‐{(η 6 ‐phenyl)tricarbonylchromium(0)‐ĸ C 2 ′}pyridine‐ĸ N ]manganese(I) Derivatives
Author(s) -
Djukic JeanPierre,
Maisse Aline,
Pfeffer Michel,
Dötz Karl Heinz,
Nieger Martin
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199811)1998:11<1781::aid-ejic1781>3.0.co;2-j
Subject(s) - chemistry , bimetallic strip , pyridine , manganese , quinoline , alkylation , chromium , medicinal chemistry , crystallography , stereochemistry , polymer chemistry , organic chemistry , catalysis
Reaction of tetracarbonyl[2‐{(η 6 ‐phenyl)tricarbonylchromium‐ĸ C 2′ }pyridine‐ĸ N ]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 MeOSO 2 CF 3 at low temperature, yields a new neutral syn ‐facial heterobimetallic analog 4a of (η 5 ‐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 MeOSO 2 CF 3 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.