Construction of crystal structures of metal(II)-benzoates (M = Mn, Ni, Co, Cu, Zn, and Cd) and 1,2-bis(4-pyridyl)ethane: Effects of metal coordination modes and their catalytic activities

Soo Hyun Kim, Byeong Kwon Park, Young Joo Song, Seung Man Yu, Hyo Geun Koo, Eun Young Kim, Jung In Poong, Ju Hoon Lee, Cheal Kim, Sung Jin Kim, Youngmee Kim

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30 Scopus citations

Abstract

Five polymeric metal(II)-benzoate complexes of formula [Mn(O2CPh)2(CH3OH)2(bpa)]n (1-Mn), [Co(O2CPh)2(H2O)(bpa)1.5]n (2-Co), [Ni(O2CPh)2(H2O)(bpa)1.5]n (3-Ni), [Cu(O2CPh)2(CH3OH)2(bpa)]n (4-Cu), and [Cd(O2CPh)2(bpa)1.5]n (6-Cd) have been synthesized and characterized (bpa = 1,2-bis(4-pyridyl)ethane). They showed two kinds of structures: parallelogram-like two-dimensional sheets for Co, Ni, and Cd, and one-dimensional chains for Mn, Cu, and Zn. Since similar structures provide similar coordination geometries, the structures depend on the coordination geometries of metal ions. The compounds 1-Mn, 2-Co, 4-Cu, 5-Zn, and 6-Cd have catalyzed efficiently the transesterification of a variety of esters, while 3-Ni has displayed a very slow conversion. The reactivity of catalyst 6-Cd containing Cd ion, well known as an inert metal ion for the ligand substitution, was found to be comparable to that of 5-Zn. The reactivities of the compounds used in this study are in the order of 5-Zn > 6-Cd > 1-Mn > 4-Cu > 2-Co ≫ 3-Ni, indicating that the non-redox metal-containing compounds (5-Zn and 6-Cd) show better activity than the redox-active metal-containing compounds (1-Mn, 4-Cu, 2-Co, and 3-Ni).

Original languageEnglish
Pages (from-to)4119-4126
Number of pages8
JournalInorganica Chimica Acta
Volume362
Issue number11
DOIs
StatePublished - 15 Aug 2009

Keywords

  • Catalytic activities
  • Coordination polymers
  • Metal coordination modes
  • Metal-benzoates
  • Transesterification

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