Extending the chain: Synthetic, structural, and reaction chemistry of a BN allenylidene analogue

Abstract

α versus γ: [CpFe(CO)(PCy3)(BNCMes 2)]+, synthesized by halide abstraction, represents the first example of a BN allenylidene analogue, and features an unsaturated MBNC π system. Although DFT calculations show significant LUMO amplitude at the γ (carbon) position, primary reactivity towards nucleophiles occurs at the sterically less hindered α (boron) center. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.