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Modified Binh Thuan bentonite catalyst was prepared by exchanging with aqueous solution of PdCl 2 , affording a catalyst loading of 0.14 mmol of Pd/g (ICP-MS). The Pd 2+ -exchanged bentonite catalyst was assessed for its activity in the the Suzuki cross-coupling reaction between iodobenzene and phenylboronic acid to form biphenyl as the principal product. The reaction was performed using 0.2 mol% catalyst at 100 o C in dimethylformamide (DMF) and in the presence of K 3 PO 4 as a base, with biphenyl being formed in a conversion of up to over 95% (GC) without added phosphine ligands. It was also observed that the modified bentonite catalyst could be facilely separated from the reaction mixture by centrifugation or simple filtration, and could be reused in subsequent reactions without significant degradation in activity.

Modified Binh Thuan bentonite as an efficient and recyclable catalyst fro the suzuki reaction between iodobenzene and phenylboronic acid