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Reactivity of nitrilotriacetic acid with polypyridyl protected as well as naked copper(II) nitrate

Kumari, Niraj, Ward, Benjamin David, Kar, Sanjib and Mishra, Lallan 2012. Reactivity of nitrilotriacetic acid with polypyridyl protected as well as naked copper(II) nitrate. Polyhedron 33 (1) , pp. 425-434. 10.1016/j.poly.2011.12.009

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Abstract

Six complexes of types [Cu(NTA)Na(H2O)](n) 1, (Cu(H(2)NTA)(2)]H2O 2, [Cu-3(C2O4)(2)(bpy)(3)(H2O)(2)](NO3)(2) 3, [Cu6Na4(NTA)(2)(mu-O)(2)(bpy)(6)(H2O)(4)(NO3)(2)]center dot 3H(2)O 4, [Cu-2(C2O4)(phen)(2)(NO3)(2)] 5, and [Cu(phen)(2)(Cl)] (NO3)(2)(H2O) 6 (bpy = 2,2'-bipyridyl, phen = 1,10-phenanthroline, H(3)NTA = nitrilotriacetic acid and C2O42- = oxalate) were synthesized and characterized using elemental analysis, spectroscopic (IR, UV-Vis and ESR), single crystal X-ray diffraction, cyclic voltammetry and differential pulse voltammetric techniques. The crystal packing of complexes 1, 2 and 3 using secondary interactions provided star like, cross linked single stranded helical and 1D zig-zag structures, respectively. Complex 4 comprised of six Cu(II) centers and four Na centers. Its assembly using secondary interactions along c axis displayed a wavy chain structure where as 5 assembled along b axis in a ladder-structure. The complex 6 is a mononuclear Cu(II) complex bearing two 1,10-phenanthroline groups, showed pi-pi interactions between their aromatic rings. DFT calculations suggested that copper activates the H(3)NTA towards formation of coordinated oxalate groups in complexes 3 and 5. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Nitrilotriacetic acid; Polynuclear Cu(II) complexes; Copper–sodium complexes; X-ray diffraction; DFT calculation
Publisher: Elsevier
ISSN: 0277-5387
Last Modified: 04 Jun 2017 03:46
URI: http://orca.cf.ac.uk/id/eprint/26356

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