Bonamico, Mario and Dessy, Giulia and Vaciago, Alessandro:
Sulla struttura del cloroaurato(III) di sodio biidrato e di altri analoghi composti
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Serie 8 39 (1965), fasc. n.6, p. 504-509, (Italian)
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Sunto
The crystal structure of sodium chloroaurate(III), NaAuCl4·2 H2O, at room temperature, has been determined by three-dimensional methods. There are four formula units in the orthorombic unit cell, a = 12.818, b = 7.067, c = 8.993 Å, with space group Pnma. The structure consists of square planar [AuCl4]- units with an average gold-chlorine bond length of 2.28 Å. Three of the chlorine atoms are close to the sodium ions, approximately at the same distance (2.97, 3.01, 3.18 Å), whereas the fourth chlorine atom is 4.37 Å from the nearest sodium ion. Each sodium ion is surrounded by seven neighbours, three chlorine atoms just mentioned and four oxygen atoms from the water molecules. Crystal data on potassium and ammonium chloroaurates are also reported.
Referenze Bibliografiche
[1] V. CAGLIOTI, C. FURLANI, F. ORESTANO e F. M. CAPECE, «Rend. Acc. Lincei», ser. VIII, 35, 10 (1963).
[2] V. CAGLIOTI, G. SARTORI e C. FURLANI, Proceedings 8th I.C.C.C., Wien 1964.
[3] E. G. COX e K. C. WEBSTER, «J. Chem. Soc.», 1635 (1936).
[4] N. ELLIOTT e L. PAULING, «J. Am. Chem. Soc.», 60, 1846 (1938).
[5] M. BONAMICO, G. DESSY e A. VACIAGO, Crystal and Molecular Structure of Sodium Chloroaurate(III) and Related Compounds, Comunicazione al Symposium on the Structure and Properties of Coordination Compounds, Bratislava 2-4 settembre 1964.
[6] J. W. MELLOR, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, Vol. III, Longmans, London 1960, pp. 593, 594.
[7] G. MAZZONE, A. VACIAGO e M. BONAMICO, «Ric. Sci», 33 (IIA), 1113 (1963).
Con il contributo del Ministero per i Beni e le Attività Culturali