A novel silver(i)-Keggin-polyoxometalate inorganic–organic hybrid: a Lewis acid catalyst for cyanosilylation reaction.

A novel polyoxometalate (POM) hybrid material based on a Keggin polyanion and silver(i)–organic sheet, namely, [Ag4(apym)4(SiW12O40)]n (1), where apym = 2-aminopyrimidine, has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, thermal gravimetric analysis, powder X-ray diffraction and single-crystal X-ray diffraction. In the structure of 1, polyanions link 2D 3-connected 4·82-fes AgI–organic sheets to generate a 3D complicated framework. Moreover, the catalytic performance of 1 towards the cyanosilylation of carbonyl compounds has been tested under mild conditions, showing a high turnover number and turnover frequency. [ABSTRACT FROM AUTHOR]