Thiophene based imino-pyridyl palladium(II) complexes: Synthesis, molecular structures and Heck coupling reactions

Research output: Contribution to journalArticle

Abstract

The new compounds (5-methyl-2-thiophene-2-pyridyl(R))imine [R = methyl (L1); R = ethyl (L2)] and (5-bromo-2-thiophene-2-pyridyl(R)imine [R = methyl (L3); R = ethyl (L4)] were successfully synthesized via Schiff base condensation reaction and obtained in good yields. These potential ligands were reacted with [PdCl2(COD)] and [PdClMe(COD)] to give the corresponding complexes [PdCl2(L)] (L = L1-L4; 1–4) and [PdClMe(L)] (L = L1-L4; 5–8). All compounds were characterized by IR, 1H and 13C NMR spectroscopy, elemental analysis and mass spectrometry. The molecular structures of 1, 2, 6 and 8 were confirmed by X-ray crystallography. The complexes were evaluated as catalyst precursors for standard Heck coupling reactions and showed significant catalytic activities that could be correlated with steric and electronic influences.

Details

Authors
  • Fatma M. Elantabli
  • Mduduzi P. Radebe
  • William M. Motswainyana
  • Bernard O. Owaga
  • Samir M. El-Medani
  • Erik Ekengard
  • Matti Haukka
  • Ebbe Nordlander
  • Martin O. Onani
External organisations
  • Fayoum University
  • University of the Western Cape
  • University of KwaZulu-Natal
  • University of Jyväskylä
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Inorganic Chemistry

Keywords

  • Heck reactions, Imino-pyridyl, Molecular structures, Palladium, Synthesis
Original languageEnglish
Pages (from-to)40-47
Number of pages8
JournalJournal of Organometallic Chemistry
Volume843
StatePublished - 2017 Aug 15
Peer-reviewedYes