TY - GEN AU - Hinkel,Felix AU - Freudenberg,Jan AU - Bunz,Uwe H F TI - A Stable π-Conjugated Singlet Biradical SN - 1521-3773 PY - 2018///0730 N1 - Publication Type: Journal Article UR - https://doi.org/10.1002/anie.201605490 ER -