CALM TALK 178 | Metal-Mediated Fluorination and Defluorination Processes: From Model Reactions to Catalysis

主题：CALM TALK 178 | Metal-Mediated Fluorination and Defluorination Processes: From Model Reactions to Catalysis 主讲人：Thomas Braun 时间：2024-10-30 10:00:00 地点：松江校区复合材料创新协同大楼第二报告厅 组织单位：先进低维材料中心 报告人介绍：Professor Thomas Braun studied chemistry atthe Julius-Maximilians-UniversitätWürzburg and received his Ph.D. under the supervision of Helmut Werner. After ashort stay with Pierre Dixneuf (Rennes, France) and postdoctoral work withRobin Perutz (York, UK), he obtained his habilitation at the University ofBielefeld (mentor: Peter Jutzi). In 2007, he was appointed Professor ofInorganic Chemistry at the Humboldt-Universität zu Berlin, where he is fullprofessor since 2011. Thomas Braun received the Wöhler Award for YoungScientists in 2006, the RSC Fluorine Chemistry Prize in 2007, and the Fluorine Publication prizeof the Fluorine Subject Group of the German Chemical Society in 2015. From 2010 to 2012 he served as the chair of the GDChFluorine Chemistry division and was from 2009 to 2018 vice-chair of the DFG(German Research Foundation) Research Training Group GRK 1582 Fluorine asthe Key Element. Currently he is vice-speaker of the DFG CollaborativeResearch Center Fluorospecific Interactions: Fundamentals andApplications, and is also Executive Committee Member of the FluorineDivision of the ACS. The major interests of Thomas Braun are in organometallicand fluorine chemistry as well as coordination chemistry with an emphasis onthe catalytic activation of small molecules. This involves C−F and C−H bondactivation reactions, but as well the chemistry of sulfur fluorides. He alsohas an interest in heterogeneous catalysis.报告摘要：Usefulmethods for a metal-mediated derivatization of fluorinated molecules are oftenbased on C−H or C−F bond activation reactions. In order to make C−F bondcleavage steps feasible, other strong element−fluorine bonds such as H−F orSi−F bonds have to be formed. Thus, at rhodium, highly reactive Rh(I) speciessuch as [Rh(H)(PEt3)3], [Rh{Si(OEt)3}(PEt3)3]or [Rh(GePh3)(PEt3)3] canserve as suitable tools to induce a C−F activation step, but also C−Hactivation reactions. Stoichiometric studies at the rhodium complexes as wellas initial catalytic reactions for the hydrodefluorination, silylation,germylation and C−C coupling reactions of olefinic precursors will be described(Figure). 视频： 摄影： 撰写： 信息员：张妮 编辑：高坤