Vibrational spectra and normal coordinate analyses of the gold halides AuX (X = Cl,Br and I) |
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| Affiliation: | 1. Institut UTINAM, UMR 6213 CNRS-Université de Franche-Comté, 25030 Besançon Cedex, France;2. Institut FEMTO-ST, UMR 6174 CNRS-Université de Franche-Comté, 25044 Besançon Cedex, France;3. Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, UMR 5246 CNRS-Université Lyon 1, 69622 Villeurbanne Cedex, France;4. Institut Lumière Matière, UMR 5306 CNRS-Université Lyon 1, 69622 Villeurbanne Cedex, France;5. Matériaux Ingénierie et Science, UMR 5510 CNRS-INSA de Lyon, 69621 Villeurbanne Cedex, France;6. Institut des Sciences Analytiques, UMR 5280 CNRS-Université de Lyon 1, 69100 Villeurbanne Cedex, France;1. Department of Basic Sciences and Humanities, National Institute of Technology, Imphal 795001, Manipur, India;2. Department of Chemistry, Manipur University, Canchipur 795003, Manipur, India;3. Department of Chemistry, Delhi University, Delhi 110007, India;1. Helmholtz-Zentrum Dresden – Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany;2. Universität Leipzig, Institute of Inorganic Chemistry, Johannisallee 29, 04103 Leipzig, Germany;1. The Institute of Problems of Chemical Physics, Russian Academy of Sciences, Prospect Akademika Semenova 1, 142432 Chernogolovka, Russia;2. Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Leninskie gory 1/3, Russia;3. Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, 60 Garden St, Cambridge, MA 02138, USA |
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| Abstract: | Complete vibrational spectra of the gold(I) halides AuX (X = Cl, Br and I) were measured. On the basis of the crystal structures symmetry analyses for both isolated chains and unit cells of the compounds were performed. Normal coordinate calculations for the chain molecules were carried out, and the most important force constants discussed. The valence force constants fd(Au-X) decrease in the series X = Cl, Br and I (1.75 × 102, 1.63 × 102 and 1.22 × 102 N m−1, respectively) and are lower throughout than the fd values for the corresponding AuX2− anions. Correlations between valence force constants and bond lengths in both AuX and AuX2− are pointed out. |
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