The heat is on: In the first instance of thermal reactivity of the terminal borylenes [(OC)5MBN(SiMe3)2] (M=Cr, W), the new heterodinuclear complexes [(OC)4M(μ-CO){μ-BN(SiMe3)2}Pd(PCy3)] (see structure; M=Cr) are synthesized. The compounds feature a semibridging borylene ligand and, by virtue of the dative PdB bonding interaction, represent the only examples of terminal borylene species stabilized by a transition-metal base.
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Braunschweig et al. (2005) studied this question.
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