Ce_Er_Carbox final revision Which is accepted.pdf (414 kB)
Synthesis and structural characterization of Dinuclear Cerium(III) and Erbium(III) complexes of Nicotinic acid or 2-Aminobenzoic acid
journal contribution
posted on 2018-06-22, 08:37 authored by Sajjad Hussain, Islam Ullah Ullah Khan, Mark ElsegoodMark Elsegood, Nadia Jabeen, Muhammad Nawaz Tahir, Saeed Ahmad, Sadaf MutahirA 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
PolyhedronCitation
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
© ElsevierVersion
- 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
2018-06-04Publication date
2018-06-07Notes
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.2018.05.057ISSN
0277-5387Publisher version
Language
- en