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

Summary, in English

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.

• Author: 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
• Department/s: Chemical Physics
• Publishing year: 2017-08-15
• Language: English
• Pages: 40-47
• Publication/Series: Journal of Organometallic Chemistry
• Volume: 843
• Links: http://dx.doi.org/10.1016/j.jorganchem.2017.04.022
• Document type: Journal article
• Publisher: Elsevier
• Topic: Inorganic Chemistry
• Keywords: Heck reactions; Imino-pyridyl; Molecular structures; Palladium; Synthesis
• Status: Published
• ISBN/ISSN/Other: ISSN: 0022-328X