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Synthesis and Characterization of New Tetradentate Ligands

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Abstract

Four new tetradentate ligands [1–4] have been prepared by a 1:2 molar condensation of an aromatic dialdehyde (terephthalaldehyde) with thiophen-2-ylmethanamine, 2-(thiophen-2-yl)ethanamine, pyridin-2-ylmethanamine and 2-(pyridin-2-yl)ethanamine. The ligands were characterised on the basis of their elemental analysis, IR spectroscopies, 1H, 13C NMR, ESI-mass spectrometry and for ligands 1, 2 and 4 also by X-ray diffraction. The crystal structures reveal that the ligands exist as discrete molecules with an average C–N bond distance of 1.2656 Å which is consistent with C=N double bonding.

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Scheme 1
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Scheme 2

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Acknowledgements

Grateful acknowledgement is made to the National Research Foundation, DST-NRF Centre of Excellence in Catalysis and Anglo Platinum Corporation for funding this project and the University of Cape Town for facilities.

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  1. Vaal University of Technology, Vanderbijlpark, South Africa

    Harry Chiririwa & Ochieng Aoyi

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  1. Harry Chiririwa
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  2. Ochieng Aoyi
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Correspondence to Harry Chiririwa.

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Chiririwa, H., Aoyi, O. Synthesis and Characterization of New Tetradentate Ligands. Iran J Sci Technol Trans Sci 41, 1003–1009 (2017). https://doi.org/10.1007/s40995-017-0316-8

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