Cheng, Haojin published the artcileIron(II) complexes containing thiophene-substituted “bispicen” ligands – Spin-crossover, ligand rearrangements, and ferromagnetic interactions, Quality Control of 52431-30-8, the publication is Canadian Journal of Chemistry (2010), 88(9), 954-963, database is CAplus.
The synthesis and characterization of three new tetradentate bispicen-type ligands containing a substituted thiophene heterocycle [I, R = H (7), Ph (8), or 2-thienyl (9)] are described. Iron(II) bis(thiocyanate) coordination complexes containing 7 – 9 were prepared, and the electronic and variable-temperature magnetic properties of complexes containing 7 (10) and 9 (12) are described. Complex 10 features a gradual and incomplete spin crossover in the solid state, and 12 remains high-spin over the entire temperature range. Complex 11 containing 8 is extremely unstable and rearranges to another iron(II) complex (13), which was structurally characterized. The temperature-dependent magnetic properties of 13 are described as a 1-dimensional ferromagnetic chain, with interchain antiferromagnetic interactions and (or) zero-field splitting dominant at low temperatures The magnetic anal. is corroborated by the mol. packing and d. functional theory calculations, which suggest intermol. interactions between coordinated thiocyanate ligands bearing a significant spin d.
Canadian Journal of Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Quality Control of 52431-30-8.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary