Pores to the fore: Nanoporous gold shows a remarkable catalytic activity for the oxidation of organosilane compounds with water. The catalyst is easily recoverable and can be reused several times without leaching and loss of activity.
By the reaction of TBA4H4[γ-SiW10O36] (TBA = tetra-n-butylammonium) with AgOAc (OAc = acetate) using dimethylphenylsilane as a reductant in acetone, a unique polyoxometalate containing a discrete octahedrally shaped [Ag6]4+ cluster, TBA8[Ag6(γ-H2SiW10O36)2]·5H2O, could be synthesized, and the molecular structure was determined.
Room temperature highlyselectiveoxidation of organosilanes to organosilanols and organosilyl ethers is achieved in liquid-phase with dealloyed nanoporous silver catalysts. In both cases, aromatic and aliphatic silanes can be effectively converted into the corresponding silanols and silyl ethers by using water and alcohols as oxidant, respectively. Moreover, hydrogen gas is the only by-product and
The first electrochemical hydrolysis of hydrosilanes to silanols under mild and neutral reaction conditions is reported. The practical protocol employs commercially available and cheap NHPI as a hydrogen‐atom transfer (HAT) mediator and operates at room temperature with high selectivity, leading to various valuable silanols in moderate to good yields. Notably, this electrochemical method exhibits a
An Ag4 diamond is encapsulated by silicotungstateligands in TBA8[Ag4(DMSO)2(γ‐H2SiW10O36)2]⋅2 DMSO⋅2 H2O (Ag4; DMSO=dimethyl sulfoxide, TBA=tetra‐n‐butylammonium), which was obtained by reaction of TBA4H4[γ‐SiW10O36] with AgOAc in an organic medium. Polyoxometalate Ag4 (see picture) selectively catalyzes hydrolyticoxidation of various silanes to the corresponding silanols in high yields (72–96 %)