Pure Appl. Chem., 2008, Vol. 80, No. 5, pp. 1187-1194
doi:10.1351/pac200880051187
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.
Keywords: boron; boryl anion; boryl complex; crystal structure; lithium.
*Paper based on a presentation at the 14th International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis (OMCOS-14), 2-6 August 2007, Nara, Japan. Other presentations are published in this issue, pp. 807-1194.