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- W2022681268 abstract "HAuCl4 bildet mit Pyridin in wäßriger Lösung schwerlösliches [Hpy] [AuCl4], das mit überschüssigem Pyridin als [AuCl2(py)2]+ wieder in Lösung geht. [Hpy][AuCl4] zersetzt sich oberhalb 195°C in HCl und AuCl3 · py, das man auch aus NaAuCl4 und Pyridin erhalten kann. AuCl2 · py entsteht bei der Reaktion von AuCl2 · S(CH2C6H4)2 mit Pyridin in Chloroform. Das Schwingungsspektrum zeigt, daß es aus trans[AuCl2(py)2]-Kationen und [AuCl2]-Anionen aufgebaut ist. Die IR-Spektren von [Hpy][AuCl4], AuCl3 · py und [AuCl2(py)2]Cl · H2O werden diskutiert und auf der Grundlage der Kristallstruktur zugeordnet. [Hpy][AuCl4] kristallisiert monoklin in der Raumgruppe C2/m. In der Struktur beobachtet man alternierende Schichten aus [Hpy]+-Kationen und [AuCl4]−-Anionen. Im monoklinen AuCl3 + py (Raumgruppe C2/c) liegen neutrale AuCl3 · py-Komplexe vor, in denen das Goldatom quadratisch-planar von drei Cl-Atomen und einem Pyridinmolekül umgeben ist. Durch zwei weiter entfernte Cl-Atome benachbarter Komplexe wird die Koordination zu einem gestreckten Oktaeder ergänzt. [AuCl2(py)2]Cl · H2O kristallisiert in der monoklinen Raumgruppe P21/n. Es bildet planare trans[AuCl2(py)2]+-Kationen, an die noch ein Cl−-Ion und ein H2O-Molekül lose koordiniert sind. Die AuCl-Abstände liegen in den untersuchten Komplexen zwischen 227 und 229 pm, die AuN-Abstände zwischen 197 und 199 pm. Pyridine Adducts of the Gold Halides. 1. Synthesis and Structure of [Hpy][AuCl4], AuC13 · py, [AuCl2(py)2]Cl · H2O, and [AuCl2(py)2] [AuCl2] HAuCl4 reacts with pyridine in aqueous solution to form sparingly soluble [Hpy] [AuCl4]. This goes into solution as [AuCl2(py)2]+ on adding an excess of pyridine. [Hpy][AuCl4] decomposes above 195°C to HCl and AuCl3 · py, which can also be obtained from NaAuCl4 and pyridine. AuCl2 · py is formed by the reaction of AuCl2 · S(CH2C6H4)2 with pyridine in CHCl3. According to the vibrational spectrum the complex is built up of trans[AuCl2(py)2]+ cations and [AuCl2]− anions. The IR spectra of [Hpy][AuCl4], AuCl3 · py, and [AuCl2(py)2]Cl · H2O are discussed and assigned with respect to the crystal structures. [Hpy][AuCl4] crystallizes monoclinic in the space group C2/m. In its structure alternating layers of [Hpy]+ cations and [AuCl4]− anions are observed. The monoclinic AuCl3 · py (space group C2/c) consists of molecular complexes, wherein the gold atom is surrounded by three Cl atoms and one pyridine molecule in a square planar arrangement. The coordination is completed to an elongated octahedron by two more distant Cl atoms of neighbouring complexes. [AuCl2(py)2]Cl · H2O crystallizes in the monoclinic space group P21/n. It forms planar trans[AuCl2(py)2]+ cations, weakly coordinated with an additional Cl− ion and one H2O molecule. The AuCl bond lengths in the complexes under investigation are in the range of 227 to 229 pm, the AuN distances are between 197 and 199 pm." @default.
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- W2022681268 title "Die Pyridinaddukte der Goldhalogenide. 1. Darstellung und Struktur von [Hpy][AuCl4], AuCl3 � py, [AuCl2(py)2]Cl � H2O und [AuCl2(py)2][AuCl2]" @default.
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- W2022681268 doi "https://doi.org/10.1002/zaac.19824850107" @default.
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