Premium
Are Ate Complexes True Intermediates in Lithium–Metalloid Exchange? Subtle Effects of Ion‐Pair Structure in Lithium–Tellurium and Lithium–Selenium Exchange Reactions
Author(s) -
Reich Hans J.,
Bevan Martin J.,
Gudmundsson Birgir Ö.,
Puckett Craig L.
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020916)41:18<3436::aid-anie3436>3.0.co;2-d
Subject(s) - lithium (medication) , chemistry , selenium , metalloid , tellurium , ion exchange , intramolecular force , intermolecular force , inorganic chemistry , ion , stereochemistry , molecule , organic chemistry , metal , medicine , endocrinology
Li/Te exchange via the ate complex with no contribution from direct exchange (i.e., k d =0) was demonstrated by NMR studies on an intermolecular reaction (see scheme; M=Te, Ar=5‐diphenylphosphanyl‐2‐thienyl). In contrast, in an intramolecular Li/Se exchange reaction, direct exchange bypasses the observable ate complex ( k d ≫ k ate ).