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Pure Appl. Chem., 2008, Vol. 80, No. 5, pp. 1187-1194

Boryllithium: A novel boron nucleophile and its application in the synthesis of borylmetal complexes

Makoto Yamashita and Kyoko Nozaki

Department of Chemistry and Biotechnology, Graduate School of Engineering,The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan

Abstract: The first boryl anion, boryllithium, was synthesized by a reduction of bromoborane precursor using lithium naphthalenide in tetrahydrofuran (THF) solvent at -45 °C. Structural and spectroscopic study revealed an ionic character of B-Li bond. Boryllithium could be utilized as a source of boryl ligand in the transition-metal chemistry. Structural and spectroscopic features of the resulting boryl complexes confirmed the large trans influence of boryl ligand.