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Isolation of a Bis(oxazol-2-ylidene)–Phenylborylene Adduct and its Reactivity as a Boron-Centered Nucleophile

Authors

  • Dr. Lingbing Kong,

    1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21, Singapore 637371 (Singapore)
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  • Dr. Yongxin Li,

    1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21, Singapore 637371 (Singapore)
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  • Dr. Rakesh Ganguly,

    1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21, Singapore 637371 (Singapore)
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  • Prof. Dr. Dragoslav Vidovic,

    1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21, Singapore 637371 (Singapore)
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  • Prof. Dr. Rei Kinjo

    Corresponding author
    1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21, Singapore 637371 (Singapore)
    • Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Link 21, Singapore 637371 (Singapore)

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  • We gratefully acknowledge financial support from Nanyang Technological University and PSF/A*STAR (SERC 1321202066) of Singapore.

Abstract

An isolable phenylborylene species supported by two oxazol-2-ylidene ligands was synthesized and structurally characterized. Computational studies revealed the presence of lone-pair electrons on the boron atom in this molecule; therefore, there are eight electrons around the three-coordinate boron center. The nucleophilic property was confirmed by the reactions with trifluoromethanesulfonic acid and [(thf)Cr(CO)5], which gave the corresponding conjugate acid and a chromium–borylene complex, respectively.

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