Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 7181-87-5, C9H11IN2. A document type is Article, introducing its new discovery., Computed Properties of C9H11IN2
Palladium catalyst coordinated in knitting N-heterocyclic carbene porous polymers for efficient Suzuki-Miyaura coupling reactions
Three N-heterocyclic carbenes (NHCs) were successfully integrated into the skeleton of hyper-crosslinked polymers (HCPs) via an external cross-linking reaction. The structure and composition of the solid catalyst was characterized by SEM, N2 sorption, FT-IR, XPS and CP/MAS NMR. Depending on the nature of the NHCs, the Brunauer-Emmett-Teller (BET) surface area of HCPs could be tuned and a BET surface area as high as 1229 m2 g-1 was achieved. The Poly-NHC-2-Pd2+ catalyst afforded rapid conversion for the Suzuki-Miyaura cross-coupling reactions of various aryl halides and arylboronic acids even at a Pd loading of 0.057 mmol% in aqueous media. In particular, because of the substantial porosity and individual pore structure toward the entrapped Pd species, Poly-NHC-2-Pd2+ showed outstanding stability and recyclability, which could be reused at least 5 times without significant loss of activity. The developed microporous catalyst combined with the NHC-functionalize is one of the most efficient heterogeneous systems for Suzuki-Miyaura cross-coupling reactions of aryl halides.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare