Crystal structure and thermal behavior of some cerium complexes with the fluorinated β-diketonate ligand 6,6,6-trifluoro-2,2-dimethyl-3,5-hexanedione (fdh)

M. Becht, K. H. Dahmen, V. Gramlich, A. Marteletti

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27 Citations (Scopus)

Abstract

Complexes of the type Ce(fdh)4, M[Ce(fdh)4] and Ce(fdh)3phen were synthesized using the fluorinated β-diketone ligand fdh = 6,6,6-trifluoro-2,2-dimethyl-3,5-hexanedione (phen = 1,10-ortho-phenanthroline; M = NH4, Na). The result of a synthesis depends on the stoichiometry of the edducts. The complexes are non-hygroscopic, air-stable solids. Ce(fdh)4, Na[Ce(fdh)4] and phenCe(fdh)3 are thermally stable and can be sublimed, whereas NH4[Ce(fdh)4] decomposes during heating. The compounds were characterized by mass spectrometry, infrared spectroscopy and thermal analysis (TG/DTA). The crystal structures of Ce(fdh)4 and NH4[Ce(fdh)4] were determined. NH4[Ce(fdh)4] crystallized in the orthorhombic space group Pnna with a = 32.988(11), b = 17.989(9), c = 15.064(5) Å and Z = 8. Ce(fdh)4 crystallized in the monoclinic space group Cc with a = 20.85(3), b = 11.738(12), c = 17.05(5) Å, β = 95.65(19)° and Z = 4.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalInorganica Chimica Acta
Volume248
Issue number1
DOIs
Publication statusPublished - 1 Jul 1996
Externally publishedYes

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Keywords

  • β-diketonate complexes
  • Cerium complexes
  • Crystal structures
  • Fluorinated complexes

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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