164264-37-3Relevant academic research and scientific papers
Pyridyl-Functionalised Cyclopentadienyl Ligands: Building Blocks for Oligonuclear Organometallic Assemblies
Siemeling, Ulrich,Vorfeld, Udo,Neumann, Beate,Stammler, Hans-Georg
, p. 481 - 486 (2007/10/02)
Lithiated 2-methylpyridine reacts with 2,3,4,5-tetramethylfulvene (TMF) to give 2-pyridine (2H) after aqueous work-up.Similarly, a mixture of 2-methyl-6-pyridine (3H) and 2,6-bispyridine (4H2) was obtained from monolithiated 2,6-dimethylpyridine and TMF.All three compounds were obtained as a roughly statistical mixture of double-bond isomers. 2-Lithiopyridine reacts with 2,3,4,5-tetramethylcyclopent-2-enone to yield 2-(2,3,4,5-tetramethylcyclopenta-1,3-dien-1-yl)pyridine (5H) after acidic work-up.This compound was obtained as a non-statistical mixture of double-bond isomers, which is presumably due to intramolecular hydrogen-bond interactions.The lithiated derivatives 2Li, 3Li and 5Li react with iron(II) chloride to afford the respective ferrocenes (2)2Fe (8), (3)2Fe (9) and (5)2Fe (10).The structure of 10 was determined by a single-crystal X-ray diffraction study.The cyclopentadienyl ligands adopt a staggered conformation; the pyripyl rings are arranged in a stacked fashion with the closest ring-ring contact b eing 3.16 Angstroem.The distance between the iron atom and the cyclopentadienyl ring centroids is 1.66 Angstroem. - Key Words: Cyclopentadienyl ligands, functionalised / Hemilabile ligands / Cyclopentadienes, pyridyl-functionalised / Ferrocenes, pyridyl-functionalised
