Interaction of Co(II), Ni(II) and Cu(II) with dibenzo-substituted macrocyclic ligands incorporating both symmetrically and unsymmetrically arranged N, O and S donors

Vasilescu, I. M., Baldwin, D. S., Bourne, D. J., Clegg, J. K., Li, F., Lindoy, L. F. and Meehan, G. V. (2011) Interaction of Co(II), Ni(II) and Cu(II) with dibenzo-substituted macrocyclic ligands incorporating both symmetrically and unsymmetrically arranged N, O and S donors. Dalton Transactions, 40 34: 8675-8684. doi:10.1039/c1dt10523j

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Author Vasilescu, I. M.
Baldwin, D. S.
Bourne, D. J.
Clegg, J. K.
Li, F.
Lindoy, L. F.
Meehan, G. V.
Title Interaction of Co(II), Ni(II) and Cu(II) with dibenzo-substituted macrocyclic ligands incorporating both symmetrically and unsymmetrically arranged N, O and S donors
Journal name Dalton Transactions   Check publisher's open access policy
ISSN 1477-9226
1477-9234
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1039/c1dt10523j
Open Access Status File (Publisher version)
Volume 40
Issue 34
Start page 8675
End page 8684
Total pages 10
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Language eng
Formatted abstract
The synthesis and characterisation of four 17-membered, dibenzo-substituted macrocyclic ligands incorporating unsymmetrical arrangements of their N 3S 2, N 3O 2 and N 3OS (two ligands) donor atoms are described; these rings complete the matrix of related macrocyclic systems incorporating both symmetric and unsymmetric donor sets reported previously. The X-ray structures of three of the new macrocycles are reported. In two of the Cu(ii) structures only three of the possible five donor atoms present in the corresponding macrocyclic ligand bind to the Cu(ii) site, whereas all five donors are coordinated in each of the remaining complexes. The interaction of Co(ii), Ni(ii) and Cu(ii) with the unsymmetric macrocycle series has been investigated by potentiometric (pH) titration in 95% methanol; X-ray structures of two nickel and three copper complexes of these ligands, each exhibiting 1:1 (M:L) ratios, have been obtained. The results are discussed in the context of previous results for these metals with the analogous 17-membered ring systems incorporating symmetrical arrangements of their donor atoms, with emphasis being given to both the influence of the donor atom set, as well as the donor atom sequence, on the nature of the resulting complexes.
Keyword Metal-Ion recognition
X-Ray structures
Center dot S
Kinetic data
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes First published on the web 28 July 2011.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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