The 49th NOS (the 100 year anniversary) will take place on the campus of Rensselaer Polytechnic Institute (RPI) in Troy, NY from Sunday June 22 to Thursday June 26, 2025.


The Executive Committee of the Division of Organic Chemistry of the American Chemical Society and the Department of Chemistry at the University Notre Dame invite you to attend the 48th National Organic Chemistry Symposium. This biennial event will be held from Sunday, July 9 to Thursday July 13, 2023 on the campus of the University of Notre Dame. You can find some of the latest information on the upcoming NOS on Twitter Twitter with #NOS2023.

This National Organic Chemistry Symposium (NOS) will be co-chaired by Steven Silverman (Merck) and Michelle Tran-Dubé (Pfizer). The event will rely on Olaf Wiest and Juan Del Valle (University of Notre Dame) who will serve as the Local event chair.

Posters will be accepted until June 16th.

We are requiring attendees to be fully vaccinated against COVID-19 following the University of Notre Dame policy.

Several lectures from the 2013, 2015, 2017 and 2019 NOS are currently available to Organic Division members (The videos from the NOS in 2022 will be available starting in January 2023). See the Organic Division’s Main web site. The program books from all previous NOS are available from the NOS History page .

The DOC is committed to fighting racism and implicit bias. Racism, bias and hate have no place in the DOC, the ACS, in science, or anywhere. The ACS provides resources for Diversity, Inclusion and Respect. Anti-racism work requires sustained, proactive education and engagement as well as systemic, intentional efforts at micro- and macro-levels.  A recent article entitled “Organic Chemistry: A Call to Action for Diversity and Inclusion” highlights some advice for how we as individuals and as a community can take action. Additionally, the DOC has Adopted an Anti-Harassment Policy.

The National Organic Chemistry Symposium is the premier event sponsored by the Division of Organic Chemistry to highlight recent advances in organic chemistry, and provides a breadth of programming and opportunities that you won’t want to miss. Please plan to join us in 2023!