| Literature DB >> 25521538 |
Konstantin Chernichenko1, Bianka Kótai, Imre Pápai, Vladimir Zhivonitko, Martin Nieger, Markku Leskelä, Timo Repo.
Abstract
Ansa-aminoborane 1 (ortho-TMP-C6H4-BH2; TMP = 2,2,6,6-tetramethylpiperid-1-yl), a frustrated Lewis pair with the smallest possible Lewis acidic boryl site (-BH2), is prepared. Although it is present in quenched forms in solution, and BH2 represents an acidic site with reduced hydride affinity, 1 reacts with H2 under mild conditions producing ansa-ammonium trihydroborate 2. The thermodynamic and kinetic features as well as the mechanism of this reaction are studied by variable-temperature NMR spectroscopy, spin-saturation transfer experiments, and DFT calculations, which provide comprehensive insight into the nature of 1.Entities:
Keywords: aminoboranes; density functional calculations; frustrated Lewis pairs; kinetics; thermodynamics
Year: 2014 PMID: 25521538 DOI: 10.1002/anie.201410141
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336