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α‐Ethoxyvinyllithium: An Unexpected Polymeric Structure—Tetrameric Subunits Linked by LiC π Interactions
Author(s) -
Sorger Klas,
Bauer Walter,
von Ragué Schleyer Paul,
Stalke Dietmar
Publication year - 1995
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199515941
Subject(s) - carbenoid , crystal structure , crystallography , chemistry , lithium (medication) , character (mathematics) , solvent , bridging (networking) , intermolecular force , stereochemistry , molecule , organic chemistry , rhodium , catalysis , medicine , endocrinology , computer network , geometry , mathematics , computer science
Two different Li environments characterize the solvent‐free, polymeric structure of 1 in the crystal. A tetrameric chain is formed by Li atoms, which are coordinated by two O and three or five C atoms. In contrast, 1 exists as isolated tetramers in THF. The C(Li)O carbenoid character of 1 results in an elongated CO bond and in lithium bridging.