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April 10, 2026

Synthesis and Selective Carboboration Reactivity of a Flexible P-Stabilized Bromoborenium

Key Points

The study aims to explore the reactivity of a flexible P-stabilized bromoborenium in carboboration processes.
Generated bromoborenium via bromide abstraction
Reacted with internal alkynes to form ring-expanded products
Characterized compounds using single-crystal X-ray diffraction
Performed DFT calculations to gain mechanistic insights
Observation of chemo- and regioselective reactions
Formed ring-expanded products from the B-C bond
DFT calculations clarified the transformation mechanisms

Abstract

The P-stabilized bromoborenium i-Pr2P(o,o'-biphenylene)BBr+ was generated by bromide abstraction. Reaction with internal alkynes afforded ring-expanded products arising from 1,2-carboboration of the B-Cspacer bond. The reaction is both chemo- and regioselective. Following the addition of XylNC, all compounds were fully characterized, including by single-crystal X-ray diffraction. DFT calculations provide mechanistic insight and reveal the key factors governing this transformation.

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Authors

Sreejyothi P

Mudit Jain

Sonia Mallet-Ladeira

Journals

Inorganic Chemistry

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Institutions

Centre National de la Recherche Scientifique

Institut National Polytechnique de Toulouse

Laboratoire de Chimie de Coordination

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Synthesis and Selective Carboboration Reactivity of a Flexible P-Stabilized Bromoborenium

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Abstract

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