1) Araki, K.; Mutai, T.; Shigemitsu, Y.; Yamada, M.; Nakajima, T.; Kuroda, S.; Shimao, I.; J. Chem. Soc., Perkin Trans. 2, 1996, (4), 613-617
2) Luo, Y.; Nihei, M.; Wen, G.; Sun, B.; Oshio, H.; Inorg. Chem. 2016, 55(16), 8147-8152, DOI:10.1021/acs.inorgchem.6b01193 ; Ambient-Temperature Spin-State Switching Achieved by Protonation of the Amino Group in [Fe(H2Bpz2)2(bipy-NH2)]