Comparative studies of the kinetics and selectivity of the Suzuki and Heck reactions, the modified tests on homogeneity-heterogeneity and an implementation of the solid-phase variant of the Suzuki reaction indicate a substantial contribution of the heterogeneous mechanism to the Suzuki reaction catalysis which is in contrast to the Heck reaction. The contributions of molecular complexes, colloidal Pd and the larger-sized particles to Suzuki catalysis depend on the nature of the catalyst

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... r, the solvent and the temperature of the reaction. It has been established that these contributions change significantly during the reaction as well.