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2‐[Ethyl‐(2‐methallyl)amino]indenyllithium: Structural Characterization of a Base‐Free Oligomeric Supersandwich Indenyllithium Compound
Author(s) -
Fauré JeanLuc,
Erker Gerhard,
Fröhlich Roland,
Bergander Klaus
Publication year - 2000
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 - 10.1002/1099-0682(200012)2000:12<2603::aid-ejic2603>3.0.co;2-e
Subject(s) - chemistry , lithium (medication) , solid state , amine gas treating , crystal structure , enamine , stereochemistry , condensation , crystallography , polymer chemistry , organic chemistry , medicine , physics , thermodynamics , endocrinology , catalysis
Treatment of the enamine 2 , formed by condensation of 2‐indanone and ethyl(2‐methallyl)amine, with n ‐butyllithium yields 2‐[ethyl(2‐methallyl)amino]indenyllithium ( 3 ), whose structure was determined by X‐ray single crystal diffraction. Complex 3 exhibits an oligomeric supersandwich structure in the solid state, characterized by a linear string of alternating μ‐η 5 :η 5 ‐indenyl anion and lithium cation moieties along which the substituents are found attached in a helical conformational arrangement.