Synthesis and magnetic studies of pentagonal bipyramidal metal complexes of Fe, Co and Ni

摘要

Three mononuclear metal complexes [M-II(L-N3O2)(MeCN)(2)][BPh4](2) (M = Fe, 1; Co, 2; Ni, 3) were isolated and structurally characterized. Magnetic studies revealed uniaxial magnetic anisotropy for 1 (D = -17.1 cm(-1)) and 3 (D = -14.3 cm(-1)) and easy-plane magnetic anisotropy for 2 (D = +36.9 cm(-1)). Slow magnetic relaxation was observed for complexes 1 and 2 under an applied magnetic field, both of which are dominated by a Raman process.