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K 2 AuPS 4 , Tl 2 AuPS 4 , K 2 AuAsS 4 , and KAu 5 P 2 S 8 : Syntheses, Structures, and Properties of Quaternary Gold Thiophosphate and Thioarsenate Compounds
Author(s) -
Löken Sandra,
Tremel Wolfgang
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199802)1998:2<283::aid-ejic283>3.0.co;2-l
Subject(s) - thiophosphate , chemistry , monoclinic crystal system , crystallography , tetrahedron , crystal structure , thallium , ion , stereochemistry , inorganic chemistry , organic chemistry
The novel compounds K 2 AuPS 4 ( 1 ), Tl 2 AuPS 4 ( 2 ), K 2 AuAsS 4 ( 3 ), and KAu 5 P 2 S 8 ( 4 ) have been synthesized by direct reaction of the elements with a molten alkaline polythiophosphate(arsenate) flux at 550°C. The crystal structures of these compounds have been determined by single‐crystal X‐ray diffraction techniques. 1 , 2 , and 3 crystallize in the monoclinic space group P 2 1 / m . The structures of 1 , 2 , and 3 consist of infinite, one‐dimensional anionic chains running along the crystallographic b axis. The chains are separated by potassium or thallium ions. Neighbouring Au atoms are bridged by MS 4 3− tetrahedra (M = P, As) in a trans orientation. Compound 4 crystallizes in the space group P 2 1 / c . The anionic chains of 4 are built up from linear AuS 2 dumbbell units and PS 4 3− tetrahedra. The chains extend along the [110] and [110] direction and are separated by charge balancing K + cations. Each of the compounds was investigated by differential thermal analysis, FT‐IR, and solid‐state UV/Vis diffuse reflectance spectroscopy.