Mechanistic aspects of the thermal formation of halogenated organic compounds including polychlorinated dibenzo‐p‐dioxins part III†: Thermodegradation of organometallics and polymers |
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| Authors: | Ghulam Ghaus Choudhry Otto Hutzinger |
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| Institution: | Laboratory of Environmental and Toxicological Chemistry , University of Amsterdam , Nieuwe Achtergracht 166, 1018 WV, Amsterdam, The Netherlands |
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| Abstract: | Thermodegradation of organometallics viz. RMX (where M = Mg, Ti, Pd, Sn, Si, Al; and X =halogen atom) provides corresponding haloorganics i.e. RX. 1,2‐Shifts of H and Cl on the carbene species like CH2F. CF and CFCL2, CF produced from R. CF. Si F3 (R = CH2F, CFCl2) are preferred to that of fluorine. The thermolysis of R.CF2. Si Cl3 (R = CH2F) produces chloroolefins via halogen exchange. Major products of thermal degradation of poly (vinyl chloride) (PVC) are HCl and benzene but the mechanism of PVC thermodegradation is still a matter of dispute. The thermal cracking of lignins yields substituted phenols. |
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