BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT SUMMARY:Enabling Tandem Catalysis with Cooperative Ligand-Centered Reactivi ty LOCATION:Chemistry A101 TZID:America/Denver DTSTART:20230328T160000 UID:2026-04-22-19-06-48@natsci.colostate.edu DTSTAMP:20260422T190648 Description:About the Seminar\n\nTandem catalysts that catalyze two differe nt organic transformations in a single pot are highly desirable because th ey enable atom-efficient\, multi-component assembly of complex molecules f rom simple building blocks. Tandem one-pot reactions collapse the synthesi s timeline\, limit material loss\, and can reduce operational costs becaus e they do not require workup and purification after each reaction step. Ma ny examples of tandem catalysis rely on metal-catalyzed reactions involvin g one or more metal complexes. In contrast\, and despite remarkable advanc es in the development of reactive ligand platforms\, there are few example s of metal complexes that contain reactive ligands capable of performing i ndependent catalytic reactions in tandem with separate reactions at the me tal.\n\nIn this talk\, I will describe the first examples of tandem metal- ligand catalysis using a class of reactive ligands called TBDPhos. These d iphosphorus ligands contain a triaminoborane subunit derived from 1\,8\,10 \,9-triazaboradecalin (TBD) that can undergo cooperative ligand-centered r eactions. I will discuss chemical factors that control ligand-centered rea ctivity in TBDPhos complexes and show how this reactivity proceeds via for mation of highly Lewis-acidic borenium ions (three-coordinate boron cation s) while TBDPhos is bound to different transition metals. I will then desc ribe how Pd TBDPhos complexes were used successfully to access borenium-ca talyzed cycloaddition reactions at the ligand in tandem with Pd-catalyzed cross-coupling reactions at the metal. The potential advantages and limita tions of this approach will be discussed with respect to more traditional examples of tandem catalysis.\n\nAbout the Speaker\n\nScott attended colle ge after completing three years of active-duty service in the U.S. Army. H e earned his B.S. degree in chemistry from North Central College\, a small liberal arts college in Naperville\, IL. In 2006\, he entered the PhD che mistry program at the University of Illinois at Urbana-Champaign and perfo rmed research under the guidance of Gregory Girolami. Scott’s research f ocused on the synthesis and characterization of chelating borohydride liga nds and their use in the preparation of volatile transition metal\, lantha nide\, and actinide complexes for chemical vapor deposition applications. After receiving his PhD in spring 2010\, he began working as a Seaborg Pos tdoctoral Fellow with Stosh Kozimor and David Clark at Los Alamos National Lab in Los Alamos\, NM. His research there focused on ligand K-edge X-ray absorption spectroscopy (XAS) studies to understand structure-function re lationships in effective minor actinide extractants. In 2012\, Scott accep ted a faculty position at George Washington University in Washington\, DC. In 2014\, he moved his research group to the University of Iowa where he is currently an Associate Professor of Chemistry. His research interests f ocus primarily on coordination chemistry and reactive ligand design to add ress chemical challenges related to nuclear energy\, CO2 mitigation\, and catalysis. 4:00 pm END:VEVENT END:VCALENDAR