Issue 19, 2013

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

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

Supplementary files

Article information

Article type
Paper
Submitted
12 Jan 2013
Accepted
22 Feb 2013
First published
15 Mar 2013

Dalton Trans., 2013,42, 6873-6878

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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