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Tatyana V. Krasnyakova, Igor V. Zhikharev, Regina S. Mitchenko, Valeriy I. Burkhovetski, Аlexander M. Korduban, Taras V. Kryshchuk, Serge A. Mitchenko
Journal of Catalysis, Volume 288, April 2012
Abstract
Mechanical pre-grinding of solid K2PdCl4 in a vibratory micromill under acetylene or propylene atmosphere leads to the formation of catalyst for acetylene hydrochlorination by gaseous HCl. The active sites of the heterogeneous catalyst are Pd(II) chloro complexes with a coordination vacancy, capable reversibly form π-acetylene complexes. The HCl molecules participate in two steps of the reaction: acetylene chloropalladation (rate-limiting step) forming intermediate σ-chlorovinyl Pd(II) derivative and protonolysis of the last one.
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