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Mechanism of the benzenediazonium tetrafluoroborate thermolysis in the solid state |
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| Authors: | Eugen P Koval’chuk Oleksandr V Reshetnyak Zoryana Ye Kozlovs’ka Roman Ye Gladyshevs’kyj |
| Institution: | a Department of Physical and Colloid Chemistry, Ivan Franko National University of L’viv, Kyrylo and Mefodiy Str. 6, 79005 L’viv, Ukraine b Faculty of Chemistry, University of Gdańsk, J. Sobieskiego 18, 80-952 Gdańsk, Poland c Department of Inorganic Chemistry, Ivan Franko National University of L’viv, Kyrylo and Mefodiy Str. 6, 79005 L’viv, Ukraine d Department of Organic Chemistry, Ivan Franko National University of L’viv, Kyrylo and Mefodiy Str. 6, 79005 L’viv, Ukraine |
| Abstract: | The thermolysis of benzenediazonium tetrafluoroborate was studied by thermogravimetry in dynamic mode. The decomposition of ArN N]+BF4− in the solid state with the formation of C6H5F, BF3, C6H6, and N2 starts at T > 348 K. The speed of the thermolysis was estimated gravimetrically and by infrared spectroscopy, considering the change of the intensity of the absorption band at 1498 cm−1, which corresponds to fluorobenzene. The maximal rate of thermolysis observes at the 366.5 K. A kinetic scheme, which includes the formation of a neutral complex C6H5δ+?BF4δ−], is proposed for the thermolysis of arenediazonium tetrafluoroborate. The decomposition of the complex with the formation of free-radical intermediates explains the chain character of the thermolysis. |
| Keywords: | Benzenediazonium tetrafluoroborate Solid state Thermolysis Chain mechanism |
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