BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20250929T070111EDT-7477Nvz90T@132.216.98.100 DTSTAMP:20250929T110111Z DESCRIPTION:Bio:\n\nChristopher “Kit” Colin Cummins benefited from formativ e undergraduate research experiences carried out sequentially in the labor atories of Professors Susan E. Kegley\, James P. Collman\, and Peter T. Wo lczanski\, respectively of Middlebury College\, Stanford University and Co rnell University. He graduated from the latter institution with an A.B. de gree in 1989. Following this he undertook inorganic chemistry graduate stu dies under the direction of Professor Richard R. Schrock at the Massachuse tts Institute of Technology\, from which he obtained his Ph.D. degree in 1 993 with a thesis entitled “Synthetic Investigations Featuring Amidometall ic Complexes”. Also in 1993 Kit joined the chemistry faculty at MIT as an Assistant Professor\; in 1996 he was promoted to the rank of Professor\, a nd in 2015 he was named the Henry Dreyfus Professor of Chemistry.\n\nResea rch themes in the Cummins group showcase exploratory synthesis and reactiv ity studies. General areas of interest include transition-metal coordinati on chemistry\, organometallic chemistry\, small molecule activation\, meta l-ligand multiple bonds\, and group transfer reactions. We are developing anthracene-based molecular precursors to novel reactive intermediates and potential interstellar molecules. Such anthracene-based precursors are als o of interest as group transfer reagents with applications in synthesis. W e are in pursuit of reagents for selective chemical polyphosphorylation. R eactions of relevance to phosphorus sustainability are under development w ith the goal of minimizing waste and energy consumption in the upgrading o f phosphate raw materials to value-added chemicals.\n\nThe research accomp lishments of Kit’s group have been recognized with Harvard University’s E. Bright Wilson Prize\, the Phi Lambda Upsilon National Fresenius Award\, a Packard Fellowship for Science and Engineering\, an Alfred P. Sloan Found ation Fellowship\, the ACS Award in Pure Chemistry\, the NSF Alan T. Water man Award\, the TR100 Award\, an Alexander von Humboldt Research Award\, t he Dannie-Heineman Preis of the Akademie der Wissenschaften zu Göttingen\, the ACS F. Albert Cotton Award in Synthetic Inorganic Chemistry\, the Ray mond and Beverly Sackler Prize in the Physical Sciences\, the inaugural In organic Chemistry Lectureship Award\, the RSC Ludwig Mond Award\, and the Linus Pauling medal. Kit has been a Fellow of the Hagler Institute for Adv anced Study at Texas A&M University\, he is a corresponding member of the Akademie der Wissenschaften zu Göttingen\, an honorary member of the Israe l Chemical Society\, and an elected member of both the American Academy of Arts and Sciences and the National Academy of Sciences.\n\nAbstract: \n\n Reactive Intermediates & Group Transfer Reactions. We design and synthesiz e molecular precursors that can be activated by a stimulus to release a sm all molecule of interest. The molecular precursors themselves are isolated as crystalline solids\; they are typically soluble in common organic solv ents and can be weighed out and used as needed. For example\, the molecule P2A2 (A = anthracene or C14H10) is a molecular precursor to the diatomic molecule P2. Compounds having the formula RPA serve to transfer the phosph inidene (PR) group either as a freely diffusing species (R = NR’2\, single t phosphinidene) or else by inner sphere mechanisms (R = alkyl\, triplet p hosphinidene). Using the RPA reagents we are developing reactions analogou s to cyclopropanation and aziridination for delivery of the PR group to ol efins with the formation of three-membered P-containing rings\, phosphiran es.\n\nMetaphosphates and Phosphorylating Methodology. Crystalline metapho sphate salts with lipophilic counter cations are useful starting materials applicable in polar organic media. “Metaphosphate” refers to the inorgani c ion PO3(-) which\, unlike its chemical cousin\, nitrate\, exists not as a monomeric species but rather as oligomeric rings: [(PO3)n]n-. These cycl ic phosphates can be converted into electrophilic phosphorylating agents ( a) by treatment with peptide coupling reagents\, or (b) by conversion into their crystalline acid forms and subsequent dehydration. Such activated c yclic phosphates can be used directly for oligophosphorylation of C\, N\, and O nucleophiles. Phosphorylation of the Wittig reagent leads to a new p hosphorus ylide with a cyclic phosphate as the C-substituent and a non-hyd rolyzable P-C bond\, allowing for conjugation of oligophosphate groups to a biomolecule of interest by aldehyde olefination.\n\nSustainable Phosphor us Chemistry. The industrial “thermal process” by which the raw material p hosphate rock is upgraded to white phosphorus is energy intensive and gene rates CO2. We seek alternative chemical routes to value-added P-chemicals from phosphate starting materials obtained either by the agricultural “wet process” or by phosphorus recovery and recycling from waste streams. Tric hlorosilane is a high production volume chemical for its use in the manufa cture of silicon for solar panels. We show that trichlorosilane is a reduc tant for phosphate raw materials leading to the bis(trichlorosilyl) phosph ide anion [P(SiCl3)2]- as a versatile intermediate en route to compounds c ontaining P-C bonds.\n\n \n DTSTART:20190416T170000Z DTEND:20190416T183000Z LOCATION:Room 10\, Maass Chemistry Building\, CA\, QC\, Montreal\, H3A 0B8\ , 801 rue Sherbrooke Ouest SUMMARY:Chemical Society Seminar: Kit Cummins - Phosphorus-Element Bond-For ming Reactions URL:/chemistry/channels/event/chemical-society-seminar -kit-cummins-phosphorus-element-bond-forming-reactions-293043 END:VEVENT END:VCALENDAR