Tetraphenylphosphonium-hexachloroarsenat, PPh4[AsCl6]; Synthese und Kristallstruktur / Tetraphenylphosphonium Hexachloroarsenate, PPh4[AsCl6]; Synthesis and Crystal Structure
1990 ◽
Vol 45
(7)
◽
pp. 927-930
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Keyword(s):
X Ray
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When ozone is passed through a solution of (PPh4)2[As2Cl8] in dichloromethane at –40 °C, first an instable red compound forms, then intense yellow PPh4[AsCl6] is obtained. The latter can also be obtained by introducing chlorine instead of ozone. The crystal structure of PPh4[AsCl6] was determined by X-ray diffraction (844 observed unique reflexions, R = 5,9%). Crystal data: tetragonal, space group P4/n, a = 1305.6(3), c = 752.2(4) pm, Z = 2. The structure is isotypic with that for other PPh4[MCl6] compounds, the octahedral AsCl6- ions being situated on fourfold rotation axes and showing a well-known positional disorder in that they are somewhat tilted against the symmetry axes due to packing strain.
1987 ◽
Vol 42
(4)
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pp. 410-414
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Keyword(s):
1997 ◽
Vol 52
(8)
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pp. 978-980
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1992 ◽
Vol 47
(8)
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pp. 1075-1078
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Keyword(s):