Chemistry 3 3 175

Seminar Series

The Department of Chemistry hosts a seminar series during the academic year featuring presentations by individuals (students, faculty, and invited guests) discussing their research within the field of chemistry.  These presentations are free and open to the public.  

Click here to view previous semester's seminar schedules.

Upcoming Seminar:


Thursday, October 6, 2016 - 3:30PM, CL 278

Catalytic Asymmetric Chloro Functionalization of Olefins: Methodology and Mechanistic Considerations

Prof. Babak Borhan
Michigan State University

Until recently, catalytic asymmetric halofunctionalization reactions have been difficult to tame. In the past five years, however, a number of new methodologies have demonstrated the ability to control olefin facial selectivity in a variety of transformations, including halocyclizations, and inter and intramolecular haloetherification reactions. The key feature of these transformations resides with suppression of non-catalyzed background reactions that erode enantioselectivity. Moreover, competing processes such as olefin to olefin transfer of the halenium and also lack of stereochemical control in nucleophilic addition to the halo-added olefin intermediates are challenges that need to be addressed in order to deliver a highly stereoselective transformation. Though it has seen great progress, the field of stereoselective alkene halogenation has mainly advanced via a trial-and-error approach. Further progress in this area requires rational and mechanistically based approaches; the detailed nature of attack on alkenes by halenium ion donors must be understood, along with the structural and electronic character of any resulting intermediates. Despite their appearance in every sophomore organic class, the traditionally invoked cyclic three-membered halonium ion intermediates do not adequately explain a number of electrophilic halenium-initiated alkene additions, including many of our own halocyclizations. Our recent studies towards a better understanding of factors that control stereoselectivity will be presented. We have used a new parameter, halenium affinity, as a thermodynamic parameter to gauge the reactivity of various functional groups with different halenium sources. We will also discuss a number of mechanistic studies, including kinetic measurements and KIEs to unravel factors at play that result in the observed stereochemical events.

   

Fall 2016 Semester Seminar Schedule:

  

Thursday, September 1, 2016

Professor Prashant V. Kamat
Radiation Laboratory; Department of Chemistry & Biochemistry; Department of Chemical Biomolecular Engineering, University of Notre Dame

"Lead Halide Hybrid Perovskites as Efficient Light Energy Harvesters"

Thursday, September 8, 2016

Dr. Jennifer S. Holt
Assistant Professor of Chemistry, Valparaiso University

"Behavior of Brooker’s Merocyanine in Host-Guest Materials"


Thursday, October 6, 2016

Prof. Babak Borhan
Michigan State University

"Catalytic Asymmetric Chloro Functionalization of Olefins: Methodology and Mechanistic Considerations"


Thursday, October 20, 2016

Prof. Rainer Glaser
University of Missouri

 

Thursday, October 27, 2016

Dr. Jeff Gilbert
Dow Agrosciences

 

Friday, November 11, 2016

Mr. Daniel Miller & Dr. Sundeep Rayat
Chemistry, Ball State University

 

Thursday, November 17, 2016

Dr. Ryan Jeske
Assistant Professor of Chemistry, Ball State University

   
   

                                                                               

                                   











Department of Chemistry
Ball State University
Cooper Physical Science Building, room 305
Muncie, IN 47306

Hours: 8 a.m.-5 p.m. weekdays
Phone: 765-285-8060
Fax: 765-285-6505