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Issue 19, 2013
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Conformational change of a chiral Schiff base Ni(II) complex with a binaphthyl moiety: application of vibrational circular dichroism spectroscopy

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Abstract

Vibrational circular dichroism (VCD) spectroscopy was applied to study the structural change of a Ni(II) complex (denoted by [Ni(II)L]) with a chiral Schiff base ligand, (R)- or (S)-2,2′-bis(salicylideneamino)-1,1′-binaphthyl (denoted by H2L), in solution. The major signals in the mid-IR region were assigned on the basis of comparison with the DFT-calculated spectra. The complex transformed reversibly between the square-planar, tetrahedral and octahedral configurations, depending on solvents and temperature. The observed changes in the VCD peaks accompanying the transformation were analyzed in terms of the conformational change of the chiral ligand with a focus on the twisting angle in the Schiff base backbone and the dihedral angle of the binaphthyl group.

Graphical abstract: Conformational change of a chiral Schiff base Ni(ii) complex with a binaphthyl moiety: application of vibrational circular dichroism spectroscopy

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Publication details

The article was received on 12 Jan 2013, accepted on 22 Feb 2013 and first published on 15 Mar 2013


Article type: Paper
DOI: 10.1039/C3DT00112A
Citation: Dalton Trans., 2013,42, 6873-6878
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    Conformational change of a chiral Schiff base Ni(II) complex with a binaphthyl moiety: application of vibrational circular dichroism spectroscopy

    H. Sato, Y. Mori and A. Yamagishi, Dalton Trans., 2013, 42, 6873
    DOI: 10.1039/C3DT00112A

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