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Structures of Classical Reagents in Chemical Synthesis: ( n BuLi) 6 , ( t BuLi) 4 , and the Metastable ( t BuLi · Et 2 O) 2
Author(s) -
Kottke Thomas,
Stalke Dietmar
Publication year - 1993
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.199305801
Subject(s) - tetramer , octahedron , metastability , crystallography , chemistry , reagent , solid state , stereochemistry , crystal structure , organic chemistry , enzyme
Crystalline n BuLi is also hexameric; this same degree of oligomerization was determined years ago in solutions of hydrocarbons. Six Li atoms form a distorted octahedron, six of whose triangular faces are capped by n Bu groups (see structure depicted). The unusual arrangement of the β‐C atoms indicates interactions with the Li atoms. In contrast, t BuLi forms a T d ‐symmetric tetramer in the solid state.