The commensurate modulated structure of the metastable state in spin crossover complex [Fe(abpt)2(NCS)2]Electronic supplementary information (ESI) available: Sample preparation; additional structural information including crystallographic experiment, crystal data, ORTEP plots, packing diagrams, thermal dependent cell parameters, detail description of the modulated structure and tables of intra-ligand conformations and inter-ligand π–π distances. CCDC 732121–732126. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/b910378c

Two new polymorphs (C and D) of [t-Fe(abpt)2(NCS)2] are characterized, a commensurate modulated structure with the caxis tripled in the thermally quenched metastable high spin state at 25 K is found in polymorph C. [ABSTRACT FROM AUTHOR]