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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, 2015; 68(7):1115-1121
Publisher: CSIRO Publishing
Issue Date: 2015
ISSN: 0004-9425
Statement of
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
RMID: 0030024170
DOI: 10.1071/CH14618
Appears in Collections:Chemistry and Physics publications

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