Magnetite (Fe3O4) and goethite (α-FeOOH) were synthesized via a hydrothermal approach and utilized as adsorbents for Cr6+ removal in an aqueous medium. Cr3+ could migrate into bulk Fe3O4 and stabilize in form of a solid solution.
The Pd(II)-catalyzed cross-coupling Suzuki-Miyaura reaction of aryl boronic acid and aryl halide was investigated. We found that 1% PdCl2(PPh3)2,10% PPh3and 1 M Na2CO3(aq.) in refluxing 1,4-dioxane for 4 hours is the optimize condition. The desired products e.g. 2-phenyl pyridine and bipyridine derivatives were obtained in moderate to excellent yields.
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