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<p>Heck showed that phosphine ligands facilitated the reaction.</p>

<p><big>Catalyst and substrates</big></p>
<p>The reaction is catalyzed by palladium complexes. Typical catalysts and precatalysts include <a href="page.php?w=tetrakis%28triphenylphosphine%29palladium%280%29">tetrakis(triphenylphosphine)palladium(0)</a>, <a href="page.php?w=palladium_chloride">palladium chloride</a>, and <a href="page.php?w=palladium%28II%29_acetate">palladium(II) acetate</a>. Typical supporting <a href="page.php?w=ligand">ligand</a>s are <a href="page.php?w=triphenylphosphine">triphenylphosphine</a>,</p><p>
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