A Proton Magnetic Resonance Study of Cobalt(III) Complexes Containing 1,10-Phenanthroline and Ethylenediamine

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概要

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• The proton magnetic resonance (PMR) spectra of the phenanthroline ligand in [Co(phen)<SUB>3</SUB>]Cl<SUB>3</SUB>, [Co(phen)<SUB>2</SUB>-(en)]Cl<SUB>3</SUB> (new complex) and [Co(phen)(en)<SUB>2</SUB>]Cl<SUB>3</SUB> were measured in deuterium oxide and analyzed as ABX systems. Significant up-field shifts of signals were observed only for the protons 2 and 9 of [Co(phen)<SUB>3</SUB>]<SUP>3+</SUP> and the proton 2 of [Co(phen)<SUB>2</SUB>(en)]<SUP>3+</SUP>, not for the proton 9 of [Co(phen)<SUB>2</SUB>(en)]<SUP>3+</SUP> nor the protons 2 and 9 of [Co(phen)(en)<SUB>2</SUB>]<SUP>3+</SUP>. The up-field shift was considered to be due to the effect of the ring current of the other phenanthroline ligands, since the protons 2 and 9 of [Co(phen)<SUB>3</SUB>]<SUP>3+</SUP> and the proton 2 of [Co(phen)<SUB>2</SUB>(en)]<SUP>3+</SUP> lies very close and to above the neighboring aromatic ligand.

• 公益社団法人 日本化学会の論文

著者

• Fujita Junnosuke

  Department of Chemistry Faculty of Science Osaka University

• Ito Tasuku

  Department of Applied Molecular Science, Institute for Molecular Science

• Ito Haruko

  Department of Applied Molecular Science, Institute for Molecular Science, Okazaki National Research Institutes

• Ito Tasuku

  Department of Chemistry, Faculty of Education, Fukushima University

• Ito Haruko

  Department of Applied Molecular Science, Institute for Molecular Science

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• タイトル無し
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