A mixed-valence [MnIIMnIIIMnII] complex of a linear phenol-bis(pyrazole) ligand with an S = 3 spin ground state

Leoní A. Barrios, Guillem Aromí, Joan Ribas, Jorge Salinas Uber, Olivier Roubeau, Ken Sakai, Shigeyuki Masaoka, Patrick Gamez, Jan Reedijk

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Abstract

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.

Original languageEnglish
Pages (from-to)3871-3876
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number24
DOIs
Publication statusPublished - Aug 1 2008

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All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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