Dynamical processes in crystalline organometallic complexes

Article Abstract:

Crystallographic and spectroscopic analyses of different organometallic complexes showed that their molecules underwent rearrangements in the crystalline state. The dynamical behavior of the molecules in the solid state included inter- and intramolecular bonding and nonbonding interactions such as ring jumping and close packing reactions. Organic and inorganic complexes containing cyclic polyolefins, benzenes, arenes and metallocenes were found to rearrange and reorient according to the activation energies and ligands present in their system. Also, phase transitions were observed in crystalline organometallic complexes with heteroatomic or partially substituted rings.

Crystallography, Molecular dynamics, Organometallic chemistry, Solid state chemistry, Metallocenes

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Model studies of the desulfurization reactions on metal surfaces and in organometallic complexes

Article Abstract:

Model desulphuration experiments involving cyclic sulphides and thiols on metal and organometallic surfaces exhibited reactions resembling those of thiopenic compounds. All three sulfur-containing groups underwent S-H cleavage on single-crystal metal surfaces, C-S bond-regulated desulphuration and hydrogen-dependent reactions. Moreover, the reactivities of cyclic sulphides and thiolates on both metal surface and organometallic complex were similar. However, both groups had different forms of obtaining hydrogen for desulphuration processes.

Metals, Metals (Materials), Organosulfur compounds, Organic sulfur compounds, Thiols, Desulfurization, Desulfuration

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Probing surface reaction mechanisms using chemical and vibrational methods: alkyl oxidation and reactivity of alcohols on transitions metal surfaces

Article Abstract:

Surface vibrational spectroscopy in combination with systematic chemical methods is a useful technique to study complex surface reactions. Chemical fingerprinting of oxidation of methyl radical into methoxide on rhenium surface by using EELS, and determination of structure of the adsorbed methoxide by using infrared spectropscopy exemplify this usefulness. Th method is generally applicable to various reactions on all surfaces.

Usage, Transition metals, Infrared spectroscopy, Surface chemistry, Electron spectroscopy

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