127182-79-0Relevant academic research and scientific papers
Structural characterization and magnetic study (EPR and static susceptibility measurements) of a novel ferric spin-crossover complex: Bis(7-amino-4-methyl-5-aza-3-hepten-2-onato(1-))iron(III) tetraphenylborate
Costes, Jean-Pierre,Dahan, Fran?oise,Laurent, Jean-Pierre
, p. 2448 - 2452 (2008/10/08)
EPR and magnetic susceptibility studies show that [Fe(AE)2]BPh4, where AE is the monoanionic Schiff base derived from 2,4-pentanedione and 1,2-diaminoethane, is a ferric spin-crossover complex. Indeed, we observe a gradual but nearly complete transition from the high-spin (S = 1/2) to the low-spin state (S = 1/2) with decreasing temperature. The number and positions of the EPR lines in the solid state are consistent with the presence of two high-spin and one low-spin species. The compound [C14H26FeN4O2]C24H 20B crystallizes in the triclinic space group P1 with a = 12.768 (1) ?, b = 13.559 (1) ?, c = 11.092 (1) ?, α = 107.87 (1)°, β = 107.67 (1)°, γ = 79.01 (1)°, and Z = 2. The two tridentate ligands (with a meridional configuration) lie in approximately orthogonal planes around the ferric ion, providing the metal center with a pseudooctahedral geometry. The metal-ligand bond lengths are in good agreement with the presence of high-spin species at room temperature.
