The nickel, copper and zinc complexes of a potentially heptadentate nitrogen donor ligands
Mustapha, Abdullahi and Steel, Graham and Reglinski, John and Kennedy, Alan (2017) The nickel, copper and zinc complexes of a potentially heptadentate nitrogen donor ligands. Polyhedron, 129. pp. 222-228. ISSN 0277-5387 (https://doi.org/10.1016/j.poly.2017.03.050)
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Abstract
The synthesis of the potentially heptadentate ligands, tris-(2-aminobenzylidene)amino-ethylamine (L3) and tris-(o-aminobenzyl)aminoethylamine (L4) are reported. Complexes of L3 with nickel copper and zinc have been synthesised and characterised. However, the nickel and zinc compounds are observed to re-arrange during the procedures used to produce samples for X-ray diffraction analysis. In both cases aniline groups are found to migrate to give rise to unique but related coordinated polyamine species. A rational route which allows for the reduction of the imine function in L3 is presented giving rise to a heptadetate ligand (L4) which contains primary, secondary and tertiary amines. Having removed the reactive imine function, the synthesized nickel and copper complexes follow the expected synthetic and structural pattern with the nickel complex being observed to be octahedral and the copper(II) complex five coordinate. The zinc complex is in contrast different. As observed for L3, it is possible to generate simple ZnL3 complexes but these are prone to intramolecular cyclisation where an aniline nitrogen couples with the secondary amine to form a coordinated indizine.
ORCID iDs
Mustapha, Abdullahi, Steel, Graham ORCID: https://orcid.org/0000-0002-5149-283X, Reglinski, John ORCID: https://orcid.org/0000-0002-0263-4168 and Kennedy, Alan ORCID: https://orcid.org/0000-0003-3652-6015;-
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Item type: Article ID code: 60436 Dates: DateEvent17 June 2017Published4 April 2017Published Online25 March 2017AcceptedSubjects: Science > Chemistry Department: Faculty of Science > Pure and Applied Chemistry Depositing user: Pure Administrator Date deposited: 12 Apr 2017 14:28 Last modified: 07 Sep 2024 00:39 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/60436