In the presence of a simple combined catalyst of a tungstate monomer (TBA 2 WO 4, TBA: tetra-n-butylammonium) and rhodium acetate (Rh 2 (OAc) 4), hydrosilylation of various types of substances including ketone, aldehyde, carbon dioxide, alkene, nitrile, and furan derivatives efficiently proceeded, affording the corresponding hydrosilylation products in moderate to high yields (≥ 63% yields). In addition, the present system was also ...