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A: In situ PXRD pattern of reaction PPPMM‐4. a: commercial monomer containing 4‐iodophenylboronic acid and anhydride. b: K2CO3 (PDF‐2 [16‐820]). c: Pd (PDF‐2 [5‐681]). B: In situ Raman spectroscopic monitoring of reaction PPPMM‐5. At 3 h 10 min the laser had to be switched off briefly such that one acquisition is missing. For experimental details see Section 1.2 in the Supporting Information.
