After 1,5 years lock-down, the CRC will finally have guests present in Berlin on September 27/28, 2021. Besides international guests presenting their talks online, Ricardo Mata (Göttingen), Frederic Leroux (Stasbourg), Oliver Clemens (Stuttgart), Tanja Guldner (Leipzig) and Ryan Gilmour (Münster) will come to Berlin to give talks. In addition, the awardees of the Young Talents Award for Fluorine Chemistry from 2020 and 2021 with present their distinguished work. And last but not least, all projects of the CRC 1349 will present their progress in posters.