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6


Teoret. i eksperim. khimiya. 2006. Vol.42 No. 3. p. 173-177

Kinetics of Catalytic Hydrochlorination of Acetylene on the Surface
of Mechanically Pre-Activated K2PtCl4 Salt

 

R. S. Mitchenko1,2, A. A. Shubin2, A. N. Vdovichenko2


1 L. M. Litvinenko Institute of Physical-Organic and Coal Chemistry, National Academy of Sciences of Ukraine
Vul. R. Luxemburg, 70, Donetsk 83114, Ukraine. E-mail: samit@skif.net

2 Donetsk State University for Trade and Economics
Vul. Shchorsa, 31, Donetsk 83050, Ukraine


The catalysis of hydrochlorination of acetylene by gaseous HCl at room temperature on the surface of K2PtCl4 salt mechanically pre-activated in the atmosphere of acetylene was found. The product of acety- lene hydrochlorination was formed by trans-addition. The value of kinetic isotope effect (KIE) when HCl is replaced on DCl is 5 ± 1, and essentially exceeds the value 1.9 of KIE for earlier studied catalytic hydrochlorination of acetylene on the surface of mechanically pre-activated K2PtCl4 salt. The large dif- ference in KIE values argues for different reaction mechanisms in these systems.


Key word acetylene, hydrochlorination, mechanical activation, heterogeneous catalysis, platinum complexes.