Anion effects on construction of ZnII compounds with a chelating ligand bis(2-pyridylmethyl)amine and their catalytic activities

Youngmee Kim, Byeong Kwon Park, Geun Hee Eom, Soo Hyun Kim, Hyun Min Park, Young S. Choi, Ho Gyeom Jang, Cheal Kim

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10 Citations (Scopus)

Abstract

Three ZnII complexes containing bispicam ligands (bispicam = bis(2-pyridylmethyl)amine), [Zn(bispicam)2](NO3) 2·2CH3OH 4A, [Zn(bispicam)(NO3) 2] 4B, and [Zn(bispicam)2](OTf)2 6, were obtained, and their structures were determined by X-ray crystallography. Complexes of the general formulation [Zn(bispicam)2]X2 (X = Cl- (1), Br- (2), I- (3), NO3 - (4A), ClO4 - (5), and OTf- (6)) show fac geometric isomers (a) or enantiomers (c) and (d) according to anions. Moreover, complexes 4-6 could carry out the catalytic transesterification of a range of esters with methanol under the mild conditions. Importantly, the catalyst 4B with an unsaturated structure has shown better efficiency than the catalysts, 4A, 5, and 6, having saturated structures. To explain this reactivity difference, two different reaction mechanisms have been proposed (metal-based vs. amide N-H-based).

Original languageEnglish
Pages (from-to)337-343
Number of pages7
JournalInorganica Chimica Acta
Volume366
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

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Keywords

  • Bis(2-pyridylmethyl)amine
  • Catalyst
  • Geometric isomers
  • Transesterification
  • Zinc(II) complexes

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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