Saddle-Shaped Six-Coordinate Iron(III) Porphyrin Complexes Showing a Novel Spin Crossover between S=1/2 and S=3/2 Spin States This work was supported by a Grant in Aid for Scientific Research on Priority Areas (A; no. 12020257 to M.N.) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan. T.I. is grateful to the JSPS for a Research Fellowship for young scientists. We thank the Research Center for Molecular Materials, the Institute for Molecular Science (IMS), for support. The authors are grateful to Mr. Masahiro Sakai of the IMS for the assistance with the SQUID measurements.