With this aim, we designed the ClMBA2SnI4 chiral perovskites (ClMBA = 1-(4chlorophenyl)ethanamine) and investigated its crystal structure by room temperature single-crystal xray diffraction (SCXRD) together with optical spectroscopy and computational modelling. Single crystals of the R/S-enantiomers and racemic (rac) form of ClMBA2SnI4 have been prepared by solution chemistry (see Supporting Information, SI) and the respective crystal structures are solved by SCXRD. The crystallographic data and selected structural parameters are reported in Table .