Einfache heterolytische H₂‐Aktivierung mit Aminen und B(C₆F₅)₃

Abstract

Ungleiche Teilung: Metallfreie Systeme aus Aminen und B(C6F5)3 bewirken bei moderatem Druck und teilweise schon bei Raumtemperatur die einfache heterolytische Spaltung von H2. Die effiziente Reduktion von Benzaldehyd durch das Produkt dieser Reaktion (siehe Schema) weist auf das Potenzial solcher Systeme für die Anwendung in Hydrierungen hin.

Non‐Metal‐Mediated Homogeneous Hydrogenation of CO2 to CH3OH

“…13 C). B(C6F5)3 (sublimed prior to use), [22] H2O·B(C6F5)3, [17c] TMP-d1 (N-D) [23] and 1 [9] were synthesised according to literature procedures. B (ext.…”

“…[9] We have found that admission of CO 2 to a toluene solution of 1 at 100°C produces the unique formato-borate complex [TMPH][HCO 2 B(C 6 F 5 ) 3 ] (2) in quantitative yield; the reaction can be conveniently monitored using solution 19 F NMR. [10] The 1 H NMR (C 7 D 8 ) spectrum of 2 reveals a ca.…”

Highly Active Metal‐Free Catalysts for Hydrogenation of Unsaturated Nitrogen‐Containing Compounds

“…Furthermore, the Xray crystal structure study of PrI*CATH 2 revealed the same P1 space group. [18] Thus, in spite of the absence of b-protons [29] in the starting amine and the high steric hindrance of the iPrI*CAT, the Lewis acidic boron centre can abstract the a-proton of the amine fragment to form the intramolecular iminium borohydride species, which is in equilibrium with the starting ansa-aminoborane (Scheme 7).…”

Novel H2 activation by a tris[3,5-bis(trifluoromethyl)phenyl]borane frustrated Lewis pair

“…In continuation of our interest in FLP-H 2 activation chemistry, 45 we herein report a practical synthesis of BArF 18 and communicate preliminary findings of its Lewis acidic properties and differing reactivity with H 2 in an FLP system, relative to B(C 6 F 5 ) 3 .…”