Oakley, RichardRobertson, CraigWinter, StephenHoward, JudithProbert, Michael2021-09-292021-09-292021-09-16https://doi.org/10.1039/D1CC03842Ghttp://hdl.handle.net/10012/17584The crystal structure of the radical ferromagnet 1a at 2 K reveals a contraction in the unit cell c constant which, at the molecular level, translates into a decrease in slippage of the radical π-stacks and an increase in ferromagnetic exchange interactions along the stacking axis. The results of BS-DFT calculations using long-range corrected functionals are consistent with an overall ferromagnetic topology.enX-ray crystallographylow temperatureferromagnetismneutral radicalDFT calculationsArticle