The crystal and molecular structure of tetraphenylarsonium methyltetrachlorostannate(IV) showing marked variation in anion geometry
✍ Scribed by M. Webster; K.R. Mudd; D.J. Taylor
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 438 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0020-1693
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✦ Synopsis
The structure of [(C,,H&As] [CH&Cl,] has been determined by three dimensional X-ray analysis usingphotographic data and refined to R of 0.054 for 1168 observed reflections. The crystals are monoclinic, a = 13.06(2), b = 7.78(2), c = 13.01(2) & 0 = 91.7(2)" with space group P2 and with Z = 2. The structure contains two crystallographically independent discrete anions with twofold symmetry. The tin atoms have approximately trigonal bipyramidal coordination with the carbon atoms occupying an equatorial position, The Cl(ax)-Sn-Cl(ax) angles (174.6(6)" and 172.6(7/O) are similar in the two anions but the Cl(eq)-Sn-Cl(eq) angle shows a pronounced variation (104.9(7) and 126.0(6)). The geometry of the cation is as expected from earlier studies.