Abstract
Abstract The kinetics of anation of Pd(MeEt 4 dien)OH 2+ 2 by chloride ion were studied under the following conditions: 0,011 ≤ [Cl − ] ≤ 0,081 M ; 15 ≤ temperature ≤ 35°C; 1 ≤ pressure ≤ 1000 bar; [H + ] = 2.5 × 10 −3 M (HClO 4 ) and ionic strength 0,1 M (NaClO 4 ). The [Cl − ] and temperature dependencies of the reaction rate were investigated at 500 bar. A high pressure rapid mixing system was used in these studies and is described in detail. Mixing of the pressurized reactant solutions can be accomplished within five seconds so that reactions with half-lives in the order of ten seconds can be measured accurately. The activation parameters for the title reaction are considered as evidence for an associative mechanism, possibly of the I a type.
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