Premium
Phosphine Adducts of 1,2‐Dibromo‐1,2‐dimesityldiborane(4): Between Bridging Halides and Rearrangement Processes
Author(s) -
Braunschweig Holger,
Damme Alexander,
JimenezHalla Jose O. C.,
Kupfer Thomas,
Radacki Krzysztof
Publication year - 2012
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/anie.201201673
Subject(s) - adduct , phosphine , halide , chemistry , bridge (graph theory) , molecule , medicinal chemistry , stereochemistry , organic chemistry , catalysis , biology , anatomy
To bridge or not to bridge depends on the size of the Lewis base in mixed sp 2 –sp 3 phosphine adducts of Br 2 B 2 Mes 2 . Whereas reaction with bulky PMeCy 2 induced a 1,2‐rearrangement to afford the 1,1‐dimesityl adduct as the major component, the “normal” 1,2‐dimesityl adduct was favored for the smaller PEt 3 molecule. The latter contains an uncommon BBrB bridge and a rare dative BHal bonding interaction to the sp 2 boron center.