(C4H12N2)[CoCl4]: tetrahedrally coordinated Co2+ without the orbital degeneracy

C. Decaroli, A. M. Arevalo-Lopez, C. H. Woodall, E. E. Rodriguez, J. P. Attfield, S. F. Parker, C. Stock*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the synthesis, crystal structure and magnetic properties of a previously unreported Co2+ compound, (C4H12N2)[CoCl4], based upon a tetrahedral crystalline environment. The magnetic ground state of Co2+, measured with magnetization, implies an absence of spin-orbit coupling and orbital degeneracy. This contrasts with compounds based upon an octahedral and even known tetrahedral Co2+ [Cotton et al. (1961). J. Am. Chem. Soc.83, 4690] systems where a sizable spin-orbit coupling is measured. The compound is characterized with single-crystal X-ray diffraction, magnetic susceptibility, IR and UV-vis spectroscopy. Magnetic susceptibility measurements find no magnetic ordering above 2K. The results are also compared with the previously known monoclinic hydrated analogue.

Original languageEnglish
Pages (from-to)20-24
Number of pages5
JournalActa Crystallographica Section B - Structural Science
Volume71
DOIs
Publication statusPublished - Feb 2015

Keywords

  • orbital degeneracy
  • magnetic properties
  • FREE COBALTOUS COMPLEXES
  • COBALT(II) COMPLEXES
  • MAGNETIC INVESTIGATIONS
  • SYMMETRY
  • IONS

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