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- W3080772699 abstract "Three synthetic methods towards semi-planar triarylboranes with two aryl rings connected by a methylene bridge have been developed. The fine-tuning of their stereoelectronic properties and Lewis acidities was achieved by introducing fluorine, methyl, methoxy, n-butyl and phenyl groups either at their exocyclic or bridged aryl rings. X-ray diffraction analysis and quantum-chemical calculations provided quantitative information on the structural distortion experienced by the near planar hydro-boraanthracene skeleton during the association with Lewis bases such as NH3 and F−. Though the methylene bridge between the ortho-positions of two aryl rings of triarylboranes decreased the Gibbs free energies of complexation with small Lewis bases by less than 5 kJ mol−1 relative to the classical Lewis acid BAr3, the steric shielding of the CH2 bridge is sufficient to avoid the formation of Lewis adducts with larger Lewis bases such as triarylphosphines. A newly synthesized spirocyclic amino-borane with a long intramolecular B−N bond that could be dissociated under thermal process, UV-irradiation, or acidic conditions might be a potential candidate in Lewis pairs catalysis." @default.
- W3080772699 created "2020-09-01" @default.
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- W3080772699 date "2020-12-08" @default.
- W3080772699 modified "2023-09-23" @default.
- W3080772699 title "Methylene Bridging Effect on the Structures, Lewis Acidities and Optical Properties of Semi‐planar Triarylboranes" @default.
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- W3080772699 doi "https://doi.org/10.1002/chem.202003319" @default.
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- W3080772699 hasPublicationYear "2020" @default.
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