[CrF(O2 C(t) Bu)2 ]9 : Synthesis and Characterization of a Regular Homometallic Ring with an Odd Number of Metal Centers and Electrons

Robert J Woolfson; Grigore A Timco; Alessandro Chiesa; Inigo J Vitorica-Yrezabal; Floriana Tuna; Tatiana Guidi; Eva Pavarini; Paolo Santini; Stefano Carretta; Richard E P Winpenny

doi:10.1002/anie.201601734

[CrF(O2 C(t) Bu)2 ]9 : Synthesis and Characterization of a Regular Homometallic Ring with an Odd Number of Metal Centers and Electrons

Angew Chem Int Ed Engl. 2016 Jul 25;55(31):8856-9. doi: 10.1002/anie.201601734. Epub 2016 Jun 13.

Affiliations

¹ School of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester, M20 4NZ, UK.
² Dipartimento di Fisica e Scienze della Terra, Università di Parma, Parco Area della Scienze 7/A, I-43124, Parma, Italy.
³ ISIS Facility, Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK.
⁴ Institute for Advanced Simulation, Forschungzentrum Jülich, 52425, Jülich, Germany.
⁵ JARA High Performance Computing, RWTH Aachen University, 52062, Aachen, Germany.
⁶ School of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester, M20 4NZ, UK. richard.winpenny@manchester.ac.uk.

Abstract

The first regular homometallic ring containing an odd number of metal centers is reported. The ring was synthesized by means of amine-templated self-assembly. Extensive physical characterization studies, including magnetic measurements, powder inelastic neutron scattering (INS), and DFT calculations, show that the molecule has a near perfect match to the expected behavior for a frustrated system with the lowest energy pair of S=1/2 spin states separated by only 0.1 meV (0.8 cm(-1) ).

Keywords: inelastic neutron scattering; magnetic properties; molecular magnetism; spin frustration; supramolecular chemistry.

Publication types

Research Support, Non-U.S. Gov't