Hg2(CH3SO3)2: Synthese, Kristallstruktur, thermisches Verhalten und SchwingungsspektroskopieProfessor Dieter Naumann zum 60. Geburtstag gewidmet

Abstract

Inhaltsübersicht. Farblose Einkristalle von Hg 2 (CH 3 SO 3 ) 2 bilden sich bei der Umsetzung von HgO, Hg und HSO 3 CH 3 . In der monoklinen Verbindung (I2/a, Z ϭ 4, aϭ883,2(2), bϭ854,0(2), cϭ 1188,9(2) pm, β ϭ 92,55(2)°, R all ϭ0,0445) wird das Hg 2 2ϩ -Ion von zwei einzähnig angreifenden CH 3 SO 3Ϫ -Anionen umgeben. Weitere Hg-O-Kontakte treten im Bereich zwischen 262 und 276 pm auf und führen zu einer Verknüpfung der [Hg 2 (CH 3 SO 3 ) 2 ]-Einheiten.Abstract. Colorless single crystals of Hg 2 (CH 3 SO 3 ) 2 are formed in the reaction of HgO, Hg, and HSO 3 CH 3 . In the monoclinic compound (I2/a, Z ϭ 4, aϭ883.2(2), bϭ854.0(2), cϭ1188.9(2) pm, β ϭ 92.55(2)°, R all ϭ0.0445) the Hg 2 2ϩ ion is coordinated by two monodentate CH 3 SO 3Ϫ anions. Further contacts Hg-O occur in the range from 262 to 276 pm and lead to a linkage of the [Hg 2 (CH 3 SO 3 ) 2 ] units. The thermal analysis shows that Hg 2 (CH 3 SO 3 ) 2 decomposes at 300°yielding elemental mercury.Die thermische Analyse zeigt, daß Hg 2 (CH 3 SO 3 ) 2 bei 300°unter Bildung von elementarem Quecksilber zerfällt, wobei die Massenzahlen der Zersetzungsprodukte auf die Bildung von SO 3 , SO 2 , CO 2 , CO und H 2 CO schließen lassen. Im IR-und Ramanspektrum werden die typischen Schwingungen des CH 3 SO 3Ϫ -Ions beobachtet, im Raman-Spektrum findet man darüberhinaus bei 177 cm Ϫ1 die Streckschwingung Hg-Hg innerhalb des Hg 2 2ϩ -Ions.The mass numbers of the species evolved lead to the assumtion that SO 3 , SO 2 , CO 2 , CO and H 2 CO are formed during the reaction.In the IR and the Raman spectrum the typical vibrations of the CH 3 SO 3 Ϫ ion are observed, the Raman spectrum shows the Hg-Hg stretching vibration at 177 cm Ϫ1 within the Hg 2 2ϩ ion additionally.

Mercury Binding Sites in Thiol-Functionalized Mesostructured Silica

“…One possible explanation is that it indicates the presence of Hg 2 2+ . The Hg−Hg stretching vibration of Hg 2 2+ is reported to occur at 177 cm -1 . , The formation of Hg 2 2+ has been reported to occur from photochemical reduction of Hg 2+ . , …”

An optical in-situ study of the re-oxidation kinetics of mixed valent Yb3Al5O12

“…This is similar to the situation in mixed-valence europium compounds, which exhibit comparable bands in the visible. 17 In the case of mixed-valence europium chlorides, e.g., an absorption peak at about 16 000 cm À1 was attributed to an intervalence charge transfer transition (IVCT) involving divalent and trivalent europium ions. 18 According to the classification of Robin and Day 19 of intervalence charge transfer complexes, transitions of such types are typical for class II compounds.…”

Transport Properties, Local Coordination, and Thermal Stability of the Water/Diethylmethylammonium Methanesulfonate Binary System

“…This is in agreement with the up‐field shift of the –NH proton observed in the 1 H NMR spectrum (see also Figure S1) and supports the conclusion that the cation experiences weaker H‐bonding as more water is added. The hypothesis that water preferably coordinates to the anion is further confirmed by Raman spectroscopy in the spectral range 720–840 and 1,010–1,080 cm −1 , where the C–S stretching and S–O stretching modes are found 51–54. Upon increased water content both the S–O and the C–S stretching modes shift to higher frequencies, see Figure 7.…”