82026-76-4Relevant academic research and scientific papers
Bifunctional Metal-Organic Layers for Tandem Catalytic Transformations Using Molecular Oxygen and Carbon Dioxide
Jiang, Xiaomin,Lan, Guangxu,Lin, Wenbin,Ni, Kaiyuan,Quan, Yangjian,Shi, Wenjie,Song, Yang,Wang, Cheng
supporting information, p. 16718 - 16724 (2021/10/21)
Tandem catalytic reactions improve atom- and step-economy over traditional synthesis but are limited by the incompatibility of the required catalysts. Herein, we report the design of bifunctional metal-organic layers (MOLs), HfOTf-Fe and HfOTf-Mn, consisting of triflate (OTf)-capped Hf6 secondary building units (SBUs) as strong Lewis acidic centers and metalated TPY ligands as metal active sites for tandem catalytic transformations using O2 and CO2 as coreactants. HfOTf-Fe effectively transforms hydrocarbons into cyanohydrins via tandem oxidation with O2 and silylcyanation whereas HfOTf-Mn converts styrenes into styrene carbonates via tandem epoxidation and CO2 insertion. Density functional theory calculations revealed the involvement of a high-spin FeIV (S = 2) center in the challenging oxidation of the sp3 C-H bond. This work highlights the potential of MOLs as a tunable platform to incorporate multiple catalysts for tandem transformations.
Influence of an α-Cyano Function on Charge Delocalization in the Benzyl Cation. Relationship between Inductive Destabilization and Conjugative Stabilization by the Cyano Group
Gassman, Paul G.,Guggenheim, Thomas L.
, p. 3023 - 3026 (2007/10/02)
The solvolytic behavior of a series of substituted acetophenone cyanohydrin methanesulfonates has been studied in 2,2,2-trifluoroethanol.A ρ value of -6.70 was observed when the rate data was evaluated vs.Brown's ?+ values.
