- A thermodynamic and kinetic study of the heterolytic activation of hydrogen by frustrated borane-amine Lewis pairs
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Calorimetry is used to measure the reaction enthalpies of hydrogen (H 2) activation by 2,6-lutidine (Lut), 2,2,6,6-tetramethylpiperidine (TMP), N-methyl-2,2,6,6-tetramethylpiperidine (MeTMP), and tri-tert- butylphosphine (TBP) with tris(pentafl
- Karkamkar, Abhi,Parab, Kshitij,Camaioni, Donald M.,Neiner, Doinita,Cho, Herman,Nielsen, Thomas K.,Autrey, Tom
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- N-Methylacridinium Salts: Carbon Lewis Acids in Frustrated Lewis Pairs for σ-Bond Activation and Catalytic Reductions
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N-methylacridinium salts are Lewis acids with high hydride ion affinity but low oxophilicity. The cation forms a Lewis adduct with 4-(N,N-dimethylamino)pyridine but a frustrated Lewis pair (FLP) with the weaker base 2,6-lutidine which activates H2, even in the presence of H2O. Anion effects dominate reactivity, with both solubility and rate of H2 cleavage showing marked anion dependency. With the optimal anion, a N-methylacridinium salt catalyzes the reductive transfer hydrogenation and hydrosilylation of aldimines through amine-boranes and silanes, respectively. Furthermore, the same salt is active for the catalytic dehydrosilylation of alcohols (primary, secondary, tertiary, and ArOH) by silanes with no observable over-reduction to the alkanes.
- Clark, Ewan R.,Ingleson, Michael J.
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supporting information
p. 11306 - 11309
(2016/02/19)
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- PROCESS FOR PRODUCING METHANOL
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The present invention relates to a novel process for the production of methanol. The process comprises the heterolytic cleavage of hydrogen by a frustrated Lewis pair comprising a Lewis acid and a Lewis base; and the hydrogenation of CO2 with the heterolytically cleaved hydrogen to form methanol.
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Page/Page column 26-27
(2011/05/05)
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- Heterolytic cleavage of H2 by frustrated B/N Lewis pairs
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Treatment of the Lewis acid B(C6F5)3 with the Lewis base 2,6-dimethylpiperidine (DMP) resulted in the formation of the classical Lewis acid?base adduct DMP-B(C6F5) 3, 1a, which was anticipa
- Jiang, Chunfang,Blacque, Olivier,Fox, Thomas,Berke, Heinz
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body text
p. 2117 - 2124
(2011/06/22)
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- Metal-free carbon dioxide reduction and acidic C-H activations using a frustrated Lewis pair
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Activation of CO2 and acidic C-H bonds by the lutidine-tris(pentafluorophenyl)borane [Lut/B(C6F5) 3] frustrated Lewis pair (FLP) are described (lutidine = 2,6-dimethylpyridine). Lut/B(C6F5)
- Tran, Sophia D.,Tronic, Tristan A.,Kaminsky, Werner,Michael Heinekey,Mayer, James M.
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body text
p. 126 - 132
(2011/06/24)
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- From classical adducts to frustrated lewis pairs: Steric effects in the interactions of pyridines and B(C6F5)3
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The pyridine adducts of B(C6F5)3, (4-tBu)C5H4NB(C6F5)3 1, ((2-Me)C5H4N)B(C6F5)3 2, ((2-Et)C5H4/
- Geier, Stephen J.,Gille, Austin L.,Gilbert, Thomas M.,Stephan, Douglas W.
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p. 10466 - 10474
(2010/04/01)
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