563-46-2Relevant articles and documents
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Minachev et al.
, (1975)
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Alkali Metal-Naphthalene Adducts as Reagents for Neutralizing Oxide Surfaces, and the Effect of Alkali Metal Treated Surfaces in Rh-catalysed Synthesis Gas (CO + H2) Conversion
Dirkse, Hans A.,Lednor, Peter W.,Versloot, Peterina C.
, p. 814 - 815 (1982)
M+C10H8.- adducts (M = Li, Na, K) are effective reagents for eliminating acidity from the surfaces of SiO2, ZrO2, or zeolite Y; the treated surfaces +, Na+, K+ from M+C10H8.-, SiO2 + Na+ from NaNO3, or ZrO2 + Na+ from Na+C10H8.-> function as novel supports for heterogeneous Rh catalysts in the conversion of CO + H2 into MeOH with >90percent selectivity at 40-95 bar and 250-300 deg C, which contrasts with the formation of CH4 over Rh on the untreated oxides.
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Kharlamov et al.
, (1975)
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Lardicci et al.
, p. 5794,5795 (1971)
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METHOD FOR THE PREPARATION OF A COMPOSITION ENRICHED IN 2-METHYL-BUT-2-ENE AND USE FOR MAKING A POLYMER
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Page/Page column 7-8, (2021/04/01)
Method for the preparation of a composition enriched in 2-methyl-but-2-ene and use for making a polymer.
A Series of Crystallographically Characterized Linear and Branched σ-Alkane Complexes of Rhodium: From Propane to 3-Methylpentane
Bukvic, Alexander J.,Burnage, Arron L.,Tizzard, Graham J.,Martínez-Martínez, Antonio J.,Mckay, Alasdair I.,Rees, Nicholas H.,Tegner, Bengt E.,Kr?mer, Tobias,Fish, Heather,Warren, Mark R.,Coles, Simon J.,Macgregor, Stuart A.,Weller, Andrew S.
supporting information, p. 5106 - 5120 (2021/05/04)
Using solid-state molecular organometallic (SMOM) techniques, in particular solid/gas single-crystal to single-crystal reactivity, a series of σ-alkane complexes of the general formula [Rh(Cy2PCH2CH2PCy2)(ηn:ηm-alkane)][BArF4] have been prepared (alkane = propane, 2-methylbutane, hexane, 3-methylpentane; ArF = 3,5-(CF3)2C6H3). These new complexes have been characterized using single crystal X-ray diffraction, solid-state NMR spectroscopy and DFT computational techniques and present a variety of Rh(I)···H-C binding motifs at the metal coordination site: 1,2-η2:η2 (2-methylbutane), 1,3-η2:η2 (propane), 2,4-η2:η2 (hexane), and 1,4-η1:η2 (3-methylpentane). For the linear alkanes propane and hexane, some additional Rh(I)···H-C interactions with the geminal C-H bonds are also evident. The stability of these complexes with respect to alkane loss in the solid state varies with the identity of the alkane: from propane that decomposes rapidly at 295 K to 2-methylbutane that is stable and instead undergoes an acceptorless dehydrogenation to form a bound alkene complex. In each case the alkane sits in a binding pocket defined by the {Rh(Cy2PCH2CH2PCy2)}+ fragment and the surrounding array of [BArF4]- anions. For the propane complex, a small alkane binding energy, driven in part by a lack of stabilizing short contacts with the surrounding anions, correlates with the fleeting stability of this species. 2-Methylbutane forms more short contacts within the binding pocket, and as a result the complex is considerably more stable. However, the complex of the larger 3-methylpentane ligand shows lower stability. Empirically, there therefore appears to be an optimal fit between the size and shape of the alkane and overall stability. Such observations are related to guest/host interactions in solution supramolecular chemistry and the holistic role of 1°, 2°, and 3° environments in metalloenzymes.
