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Title: Synthesis and structural characterization of Dinuclear Cerium(III) and Erbium(III) complexes of Nicotinic acid or 2-Aminobenzoic acid
Authors: Hussain, Sajjad
Ullah Khan, Islam Ullah
Elsegood, Mark R.J.
Jabeen, Nadia
Tahir, Muhammad Nawaz
Ahmad, Saeed
Mutahir, Sadaf
Keywords: Cerium(III)
Erbium(III) complexes
Nicotinic acid
2-Aminobenzoic acid
Crystal structures
Issue Date: 2018
Publisher: © Elsevier
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.
Abstract: 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.
Description: This paper is in closed access until 7th June 2019.
Sponsor: 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.
Version: Accepted for publication
DOI: 10.1016/j.poly.2018.05.057
URI: https://dspace.lboro.ac.uk/2134/33511
Publisher Link: https://doi.org/10.1016/j.poly.2018.05.057
ISSN: 0277-5387
Appears in Collections:Closed Access (Chemistry)

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