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  • 1 József Attila University Department of Inorganic and Analytical Chemistry H-6701 Szeged P. O. Box 440 Hungary H-6701 Szeged P. O. Box 440 Hungary
  • | 2 Transylvanian Museum Association Department of Natural Sciences and Mathematics Cluj Romania Cluj Romania
  • | 3 Technical University of Budapest Research Group for Technical Analytical Chemistry of the Hungarian Academy of Sciences Hungary Hungary
  • | 4 Eötvös University Department of Nuclear Chemistry Budapest Budapest
  • | 5 Technical University of Budapest Department of Inorganic Chemistry H-1521 Hungary H-1521 Hungary
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A number of 15 [Fe(Diox#x00B7;H)2L2] type chelates and [Fe(Diox)3(BOR)2] clathrochelates (Diox#x00B7;H2 — dimethylglyoxime, glyoxime, propoxime, nyoxime, furyl-dioxime; L-pyridine, alkyl-pyridine derivatives, diethyl-phenyl-phosphine, diethyl-p-tolyl-phosphine) were obtained and characterized by means of far and middle FTIR and Mössbauer spectroscopic methods. Some structural problems were discussed on the basis of the optical data.The DSC measurements show the higher thermal stability of the clathrochelates without O—HO intramolecular hydrogen bonds (with asymmetric octahedral structure), as compared to the [Fe(Diox#x00B7;H)2L2] trans, symmetric chelates containing O—HO bonds. The kinetic parameters of the thermal decomposition of the complexes have been derived using the nomogram method.