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Updated: Apr 4, 2026

Synthesis of 1,2-Azaborines and the Preparation of Their Protein Complexes with T4 Lysozyme Mutants
Published on: March 25, 2017
1,2-Phosphaborines: hybrid inorganic/organic P-B analogues of benzene
Jonathan H Barnard1, Paul A Brown1, Kevin L Shuford1
1Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, TX 76798-7343 (USA).
Abstract:
Photolysis of the cyclic phosphine oligomer [PPh]5 in the presence of pentaarylboroles leads to the formation of 1,2-phosphaborines by the formal insertion of a phenylphosphinidene fragment into the endocyclic CB bond. The solid-state structure features a virtually planar central ring with bond lengths indicating significant delocalization. Appreciable ring current in the 1,2-phosphaborine core, detected in nuclear independent chemical shift (NICS) calculations, are consistent with aromatic character. These products are the first reported 1,2-BPC4 conjugated heterocycles and open a new avenue for BP as a valence isoelectronic substitute for CC in arene systems.
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