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A Cyclic Methyleneborane with Trapezoidal Geometry
Author(s) -
Höfner Andrea,
Ziegler Bernd,
Hunold Ralf,
Willershausen Peter,
Massa Werner,
Berndt Armin
Publication year - 1991
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.199105941
Subject(s) - ring (chemistry) , substituent , geometry , acceptor , boron , lewis acids and bases , transformation (genetics) , center (category theory) , molecular geometry , crystallography , pure mathematics , mathematics , chemistry , stereochemistry , physics , molecule , quantum mechanics , organic chemistry , catalysis , biochemistry , gene
The acceptor substituent on the dicoordinated boron of methyleneborane 1 increases the Lewis acidity of 1 . This explains the spontaneous transformation of 1 to the cyclic methyleneborane 2 . The unusual geometry of the five‐membered ring in 2 is due to strong σ–π interactions. The B‐B‐B three‐center two‐electron bond is the simplest of its kind. R = 2,3,5,6‐Me 4 C 6 H.