In:
Angewandte Chemie, Wiley, Vol. 134, No. 46 ( 2022-11-14)
Abstract:
A boron analogue of vinyl cation, pyridine‐stabilized N ‐phosphinoamidinato N ‐heterocyclic carbene (NHC)‐diboravinyl cation 2 + , was synthesized by displacement of bromide in diborene 1 with excess pyridine. Experimental and computational studies showed that the positive charge is mainly at the B−B skeleton with delocalization to the pyridine ligand. One of the main modes of reactivity is through the B=B double bond alongside activation of the pyridine substituent, where the B pyridine center is the predominant nucleophilic center and the predominant electrophilic center is either the activated pyridine para position or the B NHC center, illustrating the presence of diborene cation A , borylene‐borenium cation B and diborene‐pyridinium cation C resonance structures in cation 2 + .
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.46
DOI:
10.1002/ange.202212842
Language:
English
Publisher:
Wiley
Publication Date:
2022
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