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Synthesis and structural characterization of Dinuclear Cerium(III) and Erbium(III) complexes of Nicotinic acid or 2-Aminobenzoic acid

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posted on 22.06.2018 by Sajjad Hussain, Islam Ullah Ullah Khan, Mark Elsegood, Nadia Jabeen, Muhammad Nawaz Tahir, Saeed Ahmad, Sadaf Mutahir
A cerium(III) complex, [Ce2(NA)6(H2O)4] (1) and anerbium(III) complex, [Er2(2- AMB)6(H2O)4]∙3H2O (2), where NA = nicotinic acid and 2-AMB =2-aminobenzoic acid, have been prepared and characterized by IR spectroscopy, thermogravimetric analysis and X-ray crystallography. The single crystal analysis reveals that both complexes are dinuclear. In 1, the two cerium(III)ions are bridged by carboxylate groups of four nicotinate ligands. Each cerium atom in 1 is nine-coordinate and exhibits a distorted mono-capped square antiprism geometry. The Ce(III) ions are coordinated by seven oxygen atoms of the carboxylate groups and two oxygen atoms of water molecules. In 2, each Er(III) ion is eight-coordinated adopting a distorted ErO8 dodecahedral geometry. The Er(III) ions are bound to four oxygen atoms of the chelating carboxylate ligands, to one oxygen each from the two bridiging carboxylates, and two oxygen atoms of water molecules. In 2 there is an intramolecular hydrogen bond forming a six membered ring between the NH2 group and one of the carboxylate oxygens in each of the six 2-2 AMB ligands. In the crystal packing, the molecules of 1 and 2 are associated through O(or N)–H∙∙∙O and O–H∙∙∙N hydrogen bonds. In 2 the intermolecular hydrogen bonding results in a 3D supramolecular network structure.

Funding

Sajjad Hussain greatfully acknowledges the Higher Education Commission (HEC) of Pakistan for providing the financial support through Indigenious Fellowship and International Research Support Iniative Programs.

History

School

  • Science

Department

  • Chemistry

Published in

Polyhedron

Citation

HUSSAIN, S. ...et al., 2018. Synthesis and structural characterization of Dinuclear Cerium(III) and Erbium(III) complexes of Nicotinic acid or 2-Aminobenzoic acid. Polyhedron, 151, pp. 452-457.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

04/06/2018

Publication date

2018-06-07

Notes

This paper was accepted for publication in the journal Polyhedron and the definitive published version is available at https://doi.org/10.1016/j.poly.2018.05.057

ISSN

0277-5387

Language

en

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