Electrical conductivity, electronic absorption, IR and NMR studies on some ethyl cyanoacetate phenylhydrazones and their lanthanide complexes

A. A. Salem, Y. M. Issa, E. E. El-Shreafy

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The electrical conductivities and the electronic, IR and NMR spectra were measured for some ethyl cyanoacetate phenylhydrazone derivatives and their lanthanide complexes in the temperature range 20-200°C. Semiconducting behaviour was detected for these systems (positive dσ/dT). A correlation was established between the electrical properties and the structures of the free ligand molecules and their complexes. The mechanism of the conduction process was evaluated. The electronic absorption spectra in ethanol were measured and are discussed. Elemental analyses were performed and the IR and NMR spectra (of the diamagnetic complexes) were measured to throw more light on the structures of these complexes.

Original languageEnglish
Pages (from-to)851-863
Number of pages13
JournalJournal of Thermal Analysis
Volume48
Issue number4
DOIs
Publication statusPublished - Apr 1997
Externally publishedYes

Keywords

  • Activation energy
  • Electrical conductivity
  • Hydrazones
  • Ln(III) complexes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Engineering(all)

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