Crystals (Dec 2020)

Cobalt(II) Complexes Based on Benzylmalonate Anions Exhibiting Field-Induced Single-Ion Magnet Slow Relaxation Behavior

  • Ekaterina Zorina-Tikhonova,
  • Anna Matyukhina,
  • Ivan Skabitskiy,
  • Maksim Shmelev,
  • Denis Korchagin,
  • Konstantin Babeshkin,
  • Nikolay Efimov,
  • Mikhail Kiskin,
  • Igor Eremenko

DOI
https://doi.org/10.3390/cryst10121130
Journal volume & issue
Vol. 10, no. 12
p. 1130

Abstract

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The reaction of (NBu4)2Bzmal (where Bzmal2− is benzylmalonate dianion) with Co(OAc)2∙4H2O gives the [Co(Bzmal)(EtOH)(H2O)]n 2D-polymer (1). The addition of 2,2′-bipyridine (bpy) to the starting system results in the [Co(Bzmal)(bpy)2]·H2O·EtOH molecular complex (2). Their molecular and crystal structures were analyzed by single-crystal X-ray crystallography. An analysis of the static magnetic data supported by the SA-CASSCF/NEVPT2 calculations revealed the presence of easy-plane magnetic anisotropy in both complexes. The AC susceptibility data confirm that both complexes show a slow field-induced (HDC = 1000 Oe) magnetic relaxation behavior.

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