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Matrix Reactions of SiO. IR-spectroscopic Identification of the Molecules SiO2 and OSiCl2 SiO evaporated from Knudsen cell reacts in argon matrix with atomic oxygen generated by microwave excitation to molecular SiO2. Bands at 1400 cm?1 in the IR matrix spectrum are assigned to the ν3-vibration of molecules Si16O2, Si16O18O, and Si18O2. In an argon matrix SiO can reach with Cl2 by excitation of a high pressure mercury lamp to OSiCl2. Isotopic splitting (16O/18O, 28Si/29Si, 35Cl/37Cl) and force constant calculations show that the observed frequencies can be assigned to a planar molecule OSiCl2. The bending mode δ (SiCl2) could not be observed. The force constant f(SiO) is 9. 102 N m?1 for SiO2 and OSiCl2. According to the SIEBERT rule this valence force constant is expected for a double bond between silicon and oxygen.  相似文献   

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Ohne Zusammenfassung(Wissenschaftliches Laboratorium der Dr. C. Schleußner-Aktiengesellschaft in Frankfurt a. M.)  相似文献   

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