Coordination chemistry of dihydrogen

Article Abstract:

A comprehensive report on the synthesis, characterization, structure and reactivity of dihydrogen complexes is presented. The synthesis of dihydrogen complexes can be effected through reaction of coordinatively unsaturated metal fragment with hydrogen, through protonation of a neutral hydride complex and through reduction reactions. Spectroscopic data shows that the H-H bond distance ranges from 0.87-1.02 angstrom. An analysis of the NMR data suggests that the relaxation rate for polyhydride complexes cannot be obtained from the structure.

Spectra, Complex compounds

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Ligand influences on structure and reactivity in organoalkaline-earth chemistry

Article Abstract:

The effects of ligands on the organometallic derivatives of the heavy alkaline earths are investigated and compared with that on the related amides and alkoxides. Results indicate that the ligands changes the coordination environment provided by sterically bulky groups and that the ligand's size, shape, and relative donor properties affect, in one way or another, the organometallic derivative's physical properties and Lewis acidity.

Ligands, Ligands (Chemistry)

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Dihydrogen complexes as homogeneous reduction catalysts

Article Abstract:

Dihydrogen complexes such as iridium, rhodium, osmium and ruthenium are parts of the process of homogeneous reduction of unsaturated substrates. The homogenous reduction of the unsaturated substrates takes place through hydrogenation, hydrogen-transfer and hydrosilylation reactions. Iridium, osmium and ruthenium derivatives are the complexes which act as homogeneous catalysts in tolerable condition.

Analysis, Rhodium, Hydrogenation, Iridium

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