Spectroscopic structural and magnetic investigations of iron(II) complexes based on 1-isopropyl- and 1-isobutyl-substituted tetrazole ligands

摘要

Graphical abstractFe(intz)6(BF4)2 complexes with n = 3 and 4 (i3tz = 1-isopropyl-1H-tetrazole, i4tz = 1-isobutyl-1H-tetrazole) were synthesized and characterised. The [Fe(i4tz)6](BF4)2 features a complete but gradual spin transition with T½ = 223 K. In the lack of suitable crystals of [Fe(intz)6](BF4)2, the homeotypic crystals of [Ni(intz)6](BF4)2 revealed the molecular structure.