Deuterium NMR and differential scanning calorimetric studies of the calcium salts of rhodium and iridium pentadeuterides, [Ca.sub.2]Rh[D.sub.5] and [Ca.sub.2]Ir[D.sub.5]

Article Abstract:

The deuterium NMR spectra of the ternary metal deuterides (TMDs) [Ca.sub.2]Rh[D.sub.5] and [Ca.sub.2]Ir[D.sub.5] has shown that the disorder is dynamic at room temperature. The differential scanning calorimetric study of the transition in [Ca.sub.2]Ir[H.sub.5] has located a reversible phase transition at 284 K with an enthalpy change of 650 J [mol.sup.-1] and entropy change of 2.3 J [K.sup.-1] [mol.sup.-1].

Nuclear magnetic resonance, Thermal properties, Transition temperature, Phase transition temperatures

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Catalysis by oxide-supported clusters of iridium and rhodium: Hydrogenation of ethene, propene, and tolune

Article Abstract:

A study to examine the catalytic properties of small clusters of rhodium and of iridium on oxide supports using the hydrogenation reaction of ethene, propene, and toluene was conducted. The results indicated self-inhibition of reaction adsorbed hydrocarbons and differences between ethene hydrogenation and propene hydrogenation that may arise primarily from different adsorbate-adsorbate interactions.

Catalysis, Olefins, Alkenes, Hydrogenation

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Rhodium-catalyzed hydroformylation of 1-hexene in an ionic liquid: A molecular dynamics study of the hexene/[BMI][P[F.sub.6]] interface

Article Abstract:

The Biphasic systems involved in the rhodium-catalyzed hydroformylation of 1-hexene in the 1-butyl-3-methyl-imidazolium hexafluorophosphate ionic liquid ([BMI][P[F.sub.6]] IL) are studied by using molecular dynamics. The results obtained with [BMI]-[P[F.sub.6]] liquid can be used for related halogen-free ILs that is developed to obtain greener catalytic systems.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Hexene, Molecular dynamics

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