Zhou, Qingqing; Xu, Beibei; Tang, Xuan; Dai, Sheng; Ding, Bingjie; Li, Difan; Zheng, Anna; Zhang, Tong; Yao, Yefeng; Gong, Xueqing; Hou, Zhenshan published the artcile< Role of Organic Fluoride Salts in Stabilizing Niobium Oxo-Clusters Catalyzing Epoxidation>, Reference of 627-27-0, the main research area is organic fluoride salt stabilizing niobium Oxo Clusters catalyst epoxidation.
Easily available organic salts can stabilize/modify niobium (Nb) oxo-clusters. The as-synthesized Nb oxo-clusters have been characterized by various methods. These Nb oxo-clusters were catalytically active for the epoxidation of allylic alcs. and olefins with H2O2 as an oxidant. Notably, [email protected] appeared as highly dispersed nanosized particles and showed the highest catalytic activity, which can be attributed to the following reasons on the basis of characterization. First, the strong coordination of fluorine ions with Nb sites and the steric protection with bulky organic cations led to high stabilization and dispersion of the oxo-clusters in the course of the reaction. Second, a hydrogen-bond interaction between the coordinated fluorine atom and the -OH group of allylic alc. favored the epoxidation reaction. Third, the electron d. of Nb sites decreased due to the strong electron-withdrawing ability of F- adjacent to Nb sites, thus promoting the electrophilic oxygen transfer to the C=C bond.
Langmuir published new progress about Epoxidation catalysts. 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Reference of 627-27-0.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts