Gold(III) Carboxylate Complexes with N, N-Chelating Ligands: Synthesis, Structure, and Features of IR Spectra

New gold(III) carboxylate complexes [(L)Au(RCO2)2]BF4 (R = CH3, CMe3, CF3) with N, N‐chelating ligands L (L = phenanthroline, 2, 2′‐bipyridine), were obtained by the treatment of corresponding chloride complexes [(L)AuCl2]BF4 with silver(I) carboxylates. The structure of [(bipy)Au(CF3CO2)2]BF4 compl...

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Published in:Zeitschrift für anorganische und allgemeine Chemie (1950) 2013-02, Vol.639 (2), p.392-397
Main Authors: Akhmadullina, Nailya S., Borissova, Aleksandra O., Garbuzova, Irina A., Retivov, Vasiliy M., Sandu, Roman A., Kargin, Yuri F., Shishilov, Oleg N.
Format: Article
Language:eng ; ger
Subjects:
Carboxylate
Gold
IR spectroscopy
Ligands
Metallurgy
Structure
Synthesis
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Summary:New gold(III) carboxylate complexes [(L)Au(RCO2)2]BF4 (R = CH3, CMe3, CF3) with N, N‐chelating ligands L (L = phenanthroline, 2, 2′‐bipyridine), were obtained by the treatment of corresponding chloride complexes [(L)AuCl2]BF4 with silver(I) carboxylates. The structure of [(bipy)Au(CF3CO2)2]BF4 complex was determined by X‐ray diffraction analysis. When five‐coordinate gold(III) complexes [(L)AuCl3] (L = 2, 9‐dimethyl‐1, 10‐phenanthroline, 2, 2′‐biquinoline) were used as starting materials the same reaction led to unstable products, which could not to be isolated and characterized. The reactivity of chloride complexes towards different carboxylates as well as properties of resulting carboxylate compounds depends on the nature of substitute R in carboxylate groups as it was predicted by us earlier using quantum‐chemical calculations. In order to explain a difference in behaviors of four‐ and five‐coordinate gold(III) complexes infrared and far‐infrared spectra of chlorides and carboxylates were studied.
ISSN:0044-2313
1521-3749
DOI:10.1002/zaac.201200436