A novel ligand featuring one phenol and two pyrazole groups in a linear fashion was prepared. This donor facilitates the assembly of a mixed-valence chain of Mn ions in the [MnIIMnIIIMnII] sequence, with formula [Mn3(Hpbpz)2(OAc) 3-(MeOH)3] (1). Complex 1 exhibits dominant antiferromagnetic coupling between adjacent pairs of Mn ions. A fit of the magnetic susceptibility data using the Hamiltonian H = -2J1(S 1S2 + S2S3) - 2J2(S 1S3) yields coupling constants of J1 = -3.14 cm-1 and J2 = -0.39 cm-1, which leads to a spin ground state of ST = 3.
All Science Journal Classification (ASJC) codes
- Inorganic Chemistry