Catalytic alkane dehydrogenations

An electron poor iridium pincer complex for catalytic alkane dehydrogenation.

A novel electron deficient 4,6-bis(trifluoromethyl)-1,3-phenylene diphosphinite ligand 4 was developed and synthesized. Reaction of Ir precursors with ligand 4 gave chloro(hydride) pincer complex 5, which demonstrated a higher TON in alkane dehydrogenation reactions compared to similar phosphinite based pre-catalysts. The formation of cyclooctene (COE) and tert-butylethylene adducts of the 14e ...

Engineered alkane-hydroxylating cytochrome P450(BM3) exhibiting nativelike catalytic properties.

Xcvii . Dehydrogenations Produced by . Resting

IN Part I of this series [Quastel and Whetham, 1925] an account was given of the behaviour of the following groups of substances as hydrogen donators in the presence of resting B. coli. 1. Fatty acids. 2. Saturated dibasic acids. 3. Hydroxy-acids. 4. Polyhydric alcohols. 5. Monohydric alcohols. A table was given of the relative reducing powers or reducing coefficients of the hydrogen donators. ...

Towards robust alkane oxidation catalysts: electronic variations in non-heme iron(ii) complexes and their effect in catalytic alkane oxidation.

A series of non-heme iron(ii) bis(triflate) complexes containing linear and tripodal tetradentate ligands has been prepared. Electron withdrawing and electron donating substituents in the para position of the pyridine ligands as well as the effect of pyrazine versus pyridine and sulfur or oxygen donors instead of nitrogen donors have been investigated. The electronic effects induced by these su...

Catalytic consequences of spatial constraints and acid site location for monomolecular alkane activation on zeolites.

The location of Brønsted acid sites within zeolite channels strongly influences reactivity because of the extent to which spatial constraints determine the stability of reactants and of cationic transition states relevant to alkane activation catalysis. Turnover rates for monomolecular cracking and dehydrogenation of propane and n-butane differed among zeolites with varying channel structure (H...