Abstract
Metal chelates based on 3,5-di-(tert-butyl)-2-hydroxyazobenzene are synthesized and their physicochemical properties were studied. Four alternative structures and isomeric transformations between these structures were suggested on the basis of NMR data, electric dipole and magnetic moments, X-ray diffraction and quantum-chemical data. The change in stereochemistry of a complex through introduction of tert-butyl substituents was found to give unusual (for metal chelates with azo ligands (MN2O2)) dome-shaped isomers with the trans-planar coordination core at a vertex or with a distorted cis-structure.
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Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 8, 2005, pp. 563–571.
Original Russian Text Copyright © 2005 by Kogan, Lyubchenko, Shcherbakov, Ionov, Tkachev, Shilov, Aldoshin.
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Kogan, V.A., Lyubchenko, S.N., Shcherbakov, I.N. et al. New Metal Chelates with Sterically Hindered Azo Ligands: Synthesis and Physicochemical Properties. Russ J Coord Chem 31, 533–540 (2005). https://doi.org/10.1007/s11173-005-0132-0
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DOI: https://doi.org/10.1007/s11173-005-0132-0