Comparative spectral and thermal studies of [Pt(DioxH)2] chelates

Cs Várhelyi, A. Kóvacs, A. Gömöry, Cs Várhelyi, G. Pokol, Gy Farkas, P. Sohár

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Eleven [Pt(DioxH) complexes with various symmetric and asymmetric α-dioximes: R1-C(=NOH)-C(=NOH)-R2 (R1 = R2, R1 ≠ R2, R1,R2 = H, alkyl-, aryl-, alicyclic, hetero-cyclic groups) are characterized by IR, NMR, and mass spectrometry. The thermal behaviors of these complexes are studied with thermoanalytical methods (TG, DTA, and DSC). The complexes with serial number: 4, 5, 6, 7, and 10 are new compounds. The IR and 1H NMR-spectra prove the coplanar structure of the [Pt(DioxH)2] complexes stabilized by two very short O-H...O hydrogen bonds. The thermal studies show that the chelates of this type are anhydrous and decompose without well-defined, reproducible melting points. The lack of weight loss and endothermal peaks on the TG and DTA curves, respectively, between 120 and 220° C, proves this phenomenon. The thermal stability of the complexes with symmetrical ligands is higher than with asymmetrical ones. The appearance of the main peaks in the mass spectra (MS) of the complexes shows, generally, an identical decomposition mechanism for all Pt-derivatives studied.

Original languageEnglish
Pages (from-to)2429-2437
Number of pages9
JournalJournal of Coordination Chemistry
Volume62
Issue number15
DOIs
Publication statusPublished - Aug 2009

Fingerprint

chelates
Differential thermal analysis
thermal analysis
Nuclear magnetic resonance
nuclear magnetic resonance
spectroscopy
mass spectra
melting points
Mass spectrometry
Melting point
Hydrogen bonds
Thermodynamic stability
thermal stability
mass spectroscopy
Ligands
hydrogen bonds
Derivatives
Decomposition
decomposition
ligands

Keywords

  • Azomethine
  • Dioxime
  • Mass spectra
  • Pt-complexes
  • Thermoanalytical study

ASJC Scopus subject areas

  • Materials Chemistry
  • Physical and Theoretical Chemistry

Cite this

Comparative spectral and thermal studies of [Pt(DioxH)2] chelates. / Várhelyi, Cs; Kóvacs, A.; Gömöry, A.; Várhelyi, Cs; Pokol, G.; Farkas, Gy; Sohár, P.

In: Journal of Coordination Chemistry, Vol. 62, No. 15, 08.2009, p. 2429-2437.

Research output: Contribution to journalArticle

Várhelyi, Cs ; Kóvacs, A. ; Gömöry, A. ; Várhelyi, Cs ; Pokol, G. ; Farkas, Gy ; Sohár, P. / Comparative spectral and thermal studies of [Pt(DioxH)2] chelates. In: Journal of Coordination Chemistry. 2009 ; Vol. 62, No. 15. pp. 2429-2437.
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