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    Counteranion-Controlled Ag<sub>2</sub>O‑Mediated Benzimidazolium Ring Opening and Its Application in the Synthesis of Palladium Pincer-Type Complexes

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    We report a new approach to synthesize palladium complexes through Ag<sub>2</sub>O-promoted hydrolytic ring opening followed by palladium coordination. The novelty of Ag<sub>2</sub>O-promoted hydrolysis in comparison with the commonly used base-mediated hydrolysis lies in the anion-controlled product selectivity in the synthesis of pincer-type palladium complexes. Moreover, these palladium complexes have been tested in the Suzuki reaction using aryl bromides in methanol and H<sub>2</sub>O, respectively. In comparison with palladium complexes with normal coordination, the palladium complexes generated from the hydrolytic ring-opening coordination demonstrate excellent catalytic activity
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