Potassium nonahydridorhenate
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| Potassium nonahydridorhenate | |
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| Properties | |
| Molecular formula | K2ReH9 |
| Molar mass | 273.473 g/mol |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Potassium nonahydridorhenate is an inorganic compound with the formula K2ReH9. This colourless salt features the ReH92− anion, a rare example of a coordination complex bearing only hydride ligands.
The study or rhenium hydrides can be traced to the 1950's and included reports of the "rhenide" anion, supposedly Re−. These reports led to a series of investigations by A. P. Ginsberg and coworkers on the products from the reduction of perrhenate.[1]
[edit] Structure, synthesis, and properties
ReH92− is an unusual example of a nine-coordinated complex, the high coordination number being attributed to the small size of the hydride ligand and the high positive charge on the Re(VII) center. The structure consists of a tricapped trigonal prism.[2] The diamagnetic salt, like the analogous technetium compound, is prepared by treating an ethanol solution of sodium perrhenate, NaReO4, with sodium metal.[3] Via cation exchange, it can be converted to the corresponding tetraethylammonium salt, (NEt4)2ReH9.
[edit] References
- ^ A. P. Ginsberg, J. M. Miller, J. R. Cavanaugh, and B. P. Dailey (1960). "Evidence for the Existence of a Potassium Rhenium Hydride and its Bearing on the Nature of the (-1)-Oxidation State of Rhenium". Nature 185: 528–9. doi:.
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
- ^ A. P. Ginsberg, C. R. Sprinkle (1972). "Nonahydridorhenate Salts". Inorganic Syntheses 13: 219–225. doi:.
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