Di- and tri-nuclear-palladium complexes bearing piperidoimidazolin-2-ylidenes: synthesis, characterization, and catalytic applications


TURKMEN G. , ATIK A., Sahin Z. S. , TÜRKMEN H.

TETRAHEDRON, cilt.71, ss.4770-4778, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 71 Konu: 29
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.tet.2015.05.059
  • Dergi Adı: TETRAHEDRON
  • Sayfa Sayıları: ss.4770-4778

Özet

A series of di- and tri-nuclear Pd(II) complexes with piperidoimidazolin-2-ylidenes anchored to benzene ring via methylene spacers were synthesized. The obtained complexes were fully characterized by IR, H-1 NMR, C-13 NMR spectroscopy and elemental analysis. Molecular structures of two of the products have been determined by means of X-ray crystallography. Their catalytic performances in Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions were thoroughly investigated. The catalytic reactivity of new di- and tri-metallic complexes was compared with the monometallic systems. It is observed that the activities of the tri-nuclear Pd(NHC) complexes were higher than the corresponding mono- and di-nuclear complexes under the same conditions. (C) 2015 Elsevier Ltd. All rights reserved.