Phosphine Adducts of 1,2‐Dibromo‐1,2‐dimesityldiborane(4): Between Bridging Halides and Rearrangement Processes | Zendy

Braunschweig Holger | Zendy; Damme Alexander | Zendy; JimenezHalla Jose O. C. | Zendy; Kupfer Thomas | Zendy; Radacki Krzysztof | Zendy

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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.

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