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https://hdl.handle.net/2440/90262
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Type: | Journal article |
Title: | Bi-Nuclear Metal Complexes of 2,6-Bis(1,4,7- triazacyclonon-1-yl-methylene)pyridine with Zinc(II), Copper(II), and Nickel(II) |
Author: | Coghlan, C. Campi, E. Forsyth, C. Jackson, R. Hearn, M. |
Citation: | Australian Journal of Chemistry: an international journal for chemical science, 2015; 68(7):1115-1121 |
Publisher: | CSIRO Publishing |
Issue Date: | 2015 |
ISSN: | 0004-9425 1445-0038 |
Statement of Responsibility: | Campbell J. Coghlan, Eva M. Campi, Craig M. Forsyth, Roy W. Jackson and Milton T. W. Hearn |
Abstract: | The coordination chemistry of 2,6-bis(1,4,7-triazacyclonon-1-ylmethyl)pyridine (Lpyx, 1) has been investigated and shown to yield bi-nuclear metal complexes in the presence of zinc(II), copper(II), or nickel(II) ions. The reaction of (Lpyx)⋅7HCl (2) with Zn(NO3)2 gave the monomeric [Zn2(m-Cl)2(Lpyx)(H2O)](ClO4)2 (3) in which the ligand encapsulates a Zn2(m-Cl)2 moiety. Similar treatment of 2 with Cu(NO3)2 gave a bi-nuclear complex cation which exists as a 1 : 1 co-crystal {[Cu(Cl)(Lpyx)Cu(m-Cl)(Cl)](BF4)(H2O)}2 and {[Cu(Cl)(Lpyx)Cu(m-Cl)(H2O)](BF4)2(H2O)}2 (4) with two discrete CuII centres bridged by the Lpyx ligand and dimerised through an unsymmetrical Cu2(m-Cl)2 interaction. Similarly, reaction of 2 with Ni(NO3)2 also gave a dimeric complex {[Ni(Cl)(m-Cl)(Lpyx)Ni(NO3)(H2O)](PF6)}2 (5) containing two discrete NiII centres with dimerisation occurring through a symmetrical Ni2(m-Cl)2 interaction. In all cases, the Lpyx ligand binding is unsymmetrical between the two metal centres being tridentate to one and tetradentate to the other through an additional coordination of the pyridyl linker. |
Rights: | Journal compilation © CSIRO 2015 |
DOI: | 10.1071/CH14618 |
Published version: | http://dx.doi.org/10.1071/ch14618 |
Appears in Collections: | Aurora harvest 2 Chemistry and Physics publications |
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