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Phosphino-boryl-naphthalenes: geometrically enforced, yet Lewis acid responsive P → B interactions
Sébastien Bontemps1, Marc Devillard, Sonia Mallet-Ladeira
1Université de Toulouse , UPS, LHFA (Laboratoire Hétérochimie Fondamentale et Appliquée), 118 route de Narbonne, and CNRS, LHFA, UMR 5069, 31062 Toulouse, France.
Abstract:
Three naphthyl-bridged phosphine-borane derivatives 2-BCy2, 2-BMes2, and 2-BFlu, differing in the steric and electronic properties of the boryl moiety, have been prepared and characterized by spectroscopic and crystallographic means. The presence and magnitude of the P → B interactions have been assessed experimentally and theoretically. The naphthyl linker was found to enforce the P → B interaction despite steric shielding, while retaining enough flexibility to respond to the Lewis acidity of boron.
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