Properties of Pure Nitryl Bromide. Thermal Behavior, UV/Vis and FTIR Spectra, and Photoisomerization to trans-BrONO in an Argon Matrix

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• 作者：Dieter Scheffler ; Hinrich Grothe ; Helge Willner ; Andreas Frenzel ; and Cornelius Zetzsch
• 刊名：Inorganic Chemistry
• 出版年：1997
• 出版时间：January 29, 1997
• 年：1997
• 卷：36
• 期：3
• 页码：335 - 338
• 全文大小：139K
• 年卷期：v.36,no.3(January 29, 1997)
• ISSN：1520-510X

文摘

BrNO₂ is produced by the heterogeneous reaction ofClNO₂, highly diluted in He, with an aqueousbromidesolution and subsequent trapping at -155 mages/entities/deg.gif">C. The crude productis purified by trap to trap condensation andfractional sublimation in vacuo. At 300 K and a pressure of 1mbar, a half-life of about 1 h is observed. Thedecomposition produces Br₂ and NO₂. TheUV/vis and IR absorption cross sections of gaseous BrNO₂aredetermined in the ranges 185-600 nm and 2000-400cm^-1, respectively. Irradiation of matrix-isolatedBrNO₂with visible light causes nearly quantitative isomerization totrans-BrONO, while ClNO₂ is converted byUVlight into a mixture of cis- and trans-ClONO.It is possible to assign all fundamentals of BrNO₂andtrans-BrONO by comparison to the respective band position ofthe analogous molecules XNO₂ and XONO(X = Cl, F).