The 18th European Symposium on Organic Reactivity (ESOR2021) will be held online from 21 till 23 September and is free of charge.

The primary objective of ESOR is the exchange of the latest developments and ideas in the field of physical and theoretical organic chemistry.

The program extends over three days, and comprises two sessions with lectures of Distinguished Speakers as well as a poster Twitter event.

Tuesday 21 September 16-18h CET
16:00 Opening ESOR2021
16:10 Ken Houk
17:00 Peter Schreiner
17:50 Closing of the day

Wednesday 22 September
All-day Poster Twitter Event @ESOR2021online and #ESOR2021poster

Thursday 23 September 16-18h CET
16:00 Opening of the day
16:10 Guy Lloyd-Jones
17:00 Odile Eisenstein
17:50 Poster Prizes
18:00 Closing ESOR2021 Amsterdam online


Online registration is required but free of charge and starts now.
If you want to compete for the poster prize, you must send a pdf of your poster (max. 10MB) to with “ESOR2021poster” as subject including your name, university and country in the email and register for the conference.

Matthias Bickelhaupt
Chris Slootweg
Célia Fonseca Guerra
Brigitte Horsten-Niehe - conference secretary
Trevor A. Hamlin
Pascal Vermeeren

If you have any questions, please contact us at Also, follow us on Twitter @ESOR2021online.