Optical, magnetic and spectroscopic characterization of a novel iron(II) spin-transition compound with a Schiff base ligand

A novel iron(II) compound [FeL3](BF4)2, where L is the Schiff base ligand derived from 4-amino-1,2,4-triazole and 3-chlorobenzaldehyde, has been synthesized. Optical detection and magnetic measurements suggested the spin transition occurred between 180 and 192 K. The microscopic parameters and the molar thermodynamic functions were obtained from a theoretical analysis using a domain model and a two level Ising model.