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Tetra‐ tert ‐butyltetraborane(6) B 4 H 2 t Bu 4 : A Derivative in the Series B n H n +2
Author(s) -
Neu Andreas,
Mennekes Theo,
Englert Ulli,
Paetzold Peter,
Hofmann Matthias,
von Ragué Schleyer Paul
Publication year - 1997
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.199721171
Subject(s) - crystallography , crystal structure , chemistry , derivative (finance) , molecule , lithium (medication) , tetrahedron , tetrahydropyran , stereochemistry , ring (chemistry) , medicine , organic chemistry , financial economics , economics , endocrinology
The reaction of RBBr 2 and Na/K alloy or the two‐step reaction of B 4 R 4 and Na/K alloy with subsequent action of HCl results in the tetraborane B 4 H 2 R 4 (R = t Bu). A tetrahedral B 4 structure 1 with two hydrogen‐bridged opposite edges ( D 2d symmetry) is deduced from NMR data for B 4 H 2 R 4 as well as from ab initio calculations for the parent molecule B 4 H 6 and for B 4 H 2 Me 4 . Upon reaction with lithium in tetrahydropyran (L), a bridging H atom on B 4 H 2 R 4 can be replaced by the group LiL 2 . (L 2 Li)B 4 HR 4 was characterized by a crystal structure analysis.