Ruthenium pentafluoride, structure

Although the third structure type was established for ruthenium pentafluoride (88), the results were based on restricted single-crystal data, giving less accurate molecular dimensions. Full data were used for the structure analysis of the osmium compound (89 ) but the results were still unsatisfactory, because of the predominant scattering by the... 

Table 2 gives some of the physical properties of the known pentafluorides. Iridium pentafluoride is isomorphous and nearly isodimensional with ruthenium pentafluoride and presumably has the nonlinear fluorine-bridged tetrameric molecular structure, reported by Holloway, Peacock, and Small for that fluoride. In this arrangement the... 

Rhodium pentafluoride is isomorphous with its ruthenium, osmium, and iridium analogues, the crystal data being a, 12-28 b, 9-86 c, 6-48 A ]3, 99-2° Uobs-, 654-2 A Z = 8. Presumably the structural unit of this compound is a fluorine-bridged tetramer, as in ruthenium pentafluoride. It is noteworthy that the unit-cell volume is smaller than in the ruthenium analogue, possibly as a... 

W. J. Casteel, Jr., A. P. Wilkinson, H. Borrmann, R. E. Serfass and N. Bartlett, Preparation and Structure of Ruthenimn Tetrafluoride and a Structural Comparison with Ruthenium Trifluoride and Ruthenium Pentafluoride, Inorg. Chem. 31 (1992) 3124-3131. 

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