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Back Cover: Formation of an Isolable Divinylborinium Ion through Twofold 1,2‐Carboboration between a Diarylborinium Ion and Diphenylacetylene (Angew. Chem. Int. Ed. 19/2017)
Author(s) -
Tanaka Naoki,
Shoji Yoshiaki,
Hashizume Daisuke,
Sugimoto Manabu,
Fukushima Takanori
Publication year - 2017
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.201703069
Subject(s) - diphenylacetylene , chemistry , boron , ion , cover (algebra) , atom (system on chip) , reactivity (psychology) , photochemistry , medicinal chemistry , organic chemistry , catalysis , mechanical engineering , medicine , alternative medicine , pathology , computer science , engineering , embedded system
The dimesitylborinium ion (“horse”), which is the most electron‐deficient isolable two‐coordinate boron cation, was expected to be transformed into a product with an increased coordination number for the boron atom upon a chemical reaction. However, this boron cation undergoes twofold 1,2‐carboboration with diphenylacetylene to form another isolable borinium ion (“Pegasus”) with an extended π‐conjugated system. This unusual reactivity is described by Y. Shoji and co‐workers in their Communication on page 5312 ff.