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Model of a Solvent‐Shared Ion Pair with NH ⃛C Hydrogen Bonds between Amine and Carbanion—Crystal Structure of [Fluorenyllithium·2 Ethylenediamine] ∞
Author(s) -
Buchholz Stefan,
Harms Klaus,
Marsch Michael,
Massa Werner,
Boche Gernot
Publication year - 1989
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.198900721
Subject(s) - carbanion , ethylenediamine , chemistry , hydrogen bond , solvent , molecule , ion , amine gas treating , crystal structure , crystallography , inorganic chemistry , stereochemistry , organic chemistry
Whereas organolithium compounds normally crystallize as contact ion pairs , in [fluorenyllithium·2 ethylenediamine] ∞ the cation and the anion are separated by solvent molecules. Especially noteworthy is the X‐ray crystallographic detection of NH ⃛C hydrogen bonds to a “naked” Carbanion. Since anion and cation interact with the same solvent molecules the solid‐state structure of the title compound can serve as model for a solvent‐shared ion pair.