Scheme 15
From: Synergistic catalysis for the synthesis of semiconducting polymers
Proposed mechanism of Pd/Ag-mediated CDC. In the 1st cross-coupling reaction, the rate-determining step (RDS) is the C-H activation of thiophene. In the 2nd cross-coupling reaction, the C-H activation is much faster, rendering the oxidation of Pd by Ag as the RDS
