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Vol. 30 No. 2 (2018): Vol 30 Issue 2

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Synthesis and Characterization of Niobium and Tantalum Complexes with Bidentate Ligand and its use in Ring Opening Polymerization of e-Caprolactone

https://doi.org/10.14233/ajchem.2018.21144
Yahya F. Al-Khafaji
Department of Chemistry, Faculty of Science, University of Babylon, Babylon, Iraq
Mohammed R. Al-Lami
The Ministry of Higher Education and Scientific Research, Research Development Department, Baghdad, Iraq
Ahmed S. Abbas
Department of Chemistry, Faculty of Science, University of Babylon, Babylon, Iraq
Ameer Al-Ameri
Department of Chemistry, Faculty of Science, University of Babylon, Babylon, Iraq
Ahmed Falah Albo Mousa
Department of Chemistry, Faculty of Science, University of Babylon, Babylon, Iraq

Corresponding Author(s) : Yahya F. Al-Khafaji

yfalkhafaji@gmail.com

Asian Journal of Chemistry, Vol. 30 No. 2 (2018): Vol 30 Issue 2

Abstract

Reaction of two equivalents of the bidentate 2,2'-PhCH[4,6-(t-Bu)2C6H2OH]2 with one equivalent of niobium pentachloride gave the complex Nb{2,2'-PhCH[4,6-(t-Bu)2C6H2O]2}2 (1) . Similar use of two equivalents of the same ligand with one equivalents tantalum pentachloride afforded Ta{2,2'-PhCH[4,6-(t-Bu)2C6H2O]2}2 (2). The molecular structure of complexes 1 and 2 have been characterized by IR and 1H NMR. Both complexes were investigated as catalysts for polymerization of cyclic esters (e-caprolactone) with no solvent at various time at 110 °C. In all cases the polymer produced was of high yield percent.

Keywords

Niobium(V) Tantalum(V) Phenolate e-Caprolactone Ring opening polymerization
Al-Khafaji, Y. F., Al-Lami, M. R., Abbas, A. S., Al-Ameri, A., & Albo Mousa, A. F. (2017). Synthesis and Characterization of Niobium and Tantalum Complexes with Bidentate Ligand and its use in Ring Opening Polymerization of e-Caprolactone. Asian Journal of Chemistry, 30(2), 460–462. https://doi.org/10.14233/ajchem.2018.21144
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