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Apparently Regular Octahedral Coordination of Ag(II) in IF 6 [Ag(SbF 6 ) 3 ]
Author(s) -
Mazej Zoran,
Goreshnik Evgeny,
Arčon Iztok,
Zabukovec Logar Nataša,
Kaučič Venčeslav
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900238
Subject(s) - octahedron , crystallography , raman spectroscopy , chemistry , crystal structure , extended x ray absorption fine structure , coordination number , ion , absorption spectroscopy , physics , organic chemistry , quantum mechanics , optics
The crystal structure of IF 6 [Ag(SbF 6 ) 3 ] has been determined by X‐ray single crystal and X‐ray powder diffraction analysis. The structure consists from [Ag(SbF 6 ) 3 ] – chains and [IF 6 ] + cations placed between them. Ag 2+ is found in regular octahedral coordination of six fluorine atoms [Ag–F = 6 × 2.170(12) Å]. EXAFS analysis of Jahn–Teller distortions in IF 6 [Ag(SbF 6 ) 3 ] shows that Ag 2+ surrounding is elongated octahedral at room temperature. EXAFS signals are fitted with four short and two long Ag–F distances [4 × 2.11(1) Å; 2 × 2.40(2) Å]. This result is in apparent contradiction with X‐ray diffraction studies where the [AgF 6 ] moiety appears to be a regular octahedra. The Raman spectrum of IF 6 [Ag(SbF 6 ) 3 ] is in agreement with the presence of regular IF 6 and deformed SbF 6 groups.