Synthesis of complexes Fe, Co and Cu supported by "SNS" pincer ligands and their ability to catalytically form cyclic carbonates

SOĞUKÖMEROĞULLARI H. G., AYTAR E., Ulusoy M., DEMİR S., DEGE N., Richeson D. S., ...Daha Fazla

INORGANICA CHIMICA ACTA, cilt.471, ss.290-296, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 471
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.ica.2017.11.007
  • Dergi Adı: INORGANICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.290-296
  • Anahtar Kelimeler: SNS pincer ligand, Metal complexes, Catalysts, CO2, X-ray, SULFUR-CONTAINING LIGANDS, CRYSTAL-STRUCTURE, METAL-COMPLEXES, COBALOXIME/ORGANOCOBALOXIME CATALYSTS, COORDINATION CHEMISTRY, EFFICIENT CATALYSTS, CARBOXYLIC-ACIDS, ALLYL COMPLEXES, IONIC LIQUID, TRIDENTATE
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

Two pincer ligands, 2,6-bis[[(2'-methylphenyl)thio]methyl]pyridine (SNS-1) and 2,6-bis[[(20,6'-dimethylphenyl) thio]methyl]pyridine (SNS-2), each possessing a central pyridyl N-donor flanked by two thioether S-Ar functionalities were prepared and metallated with CoCl2, FeCl2 center dot 4H(2)O, CuCl2 center dot 2H(2)O metal salts. The products of reaction with SNS-1 were three new tridentate pincer complexes [M(kappa(3)-SNS-1)Cl-2] (M = Fe, Co, Cu). The reactions of ligand SNS-2 yielded analogous complexes, [M(kappa(3)-SNS-2)Cl-2], for FeCl2 and CoCl2 but in the case of the reaction with CuCl2 the product was an unanticipated Cu(I) complex [Cu(kappa(2)-SNS-2)Cl]. Single crystal X-ray diffraction analysis revealed that this Cu(I) complex displayed a bidentate S,N ligand and a pseudo-trigonal planar geometry for the Cu center. The ability of these metal complexes to catalyze the formation of cyclic carbonates from CO2 and epoxides was investigated and the less sterically hindered Co(II) complex, [Co(kappa(3)-SNS-1)Cl-2] showed superior activity. The effects of variation in time, temperature, CO2 pressure, and epoxide identity were investigated. Crown Copyright (C) 2017 Published by Elsevier B.V. All rights reserved.