Discrete and polymeric supramolecular architectures derived from dinuclear oxovanadium(IV) complexes of aryl-linked bis-diketonato ligands and nitrogen donor co-ligands

Clegg, Jack K., Kim, Yang and Lindoy, Leonard F. (2015) Discrete and polymeric supramolecular architectures derived from dinuclear oxovanadium(IV) complexes of aryl-linked bis-diketonato ligands and nitrogen donor co-ligands. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 82 1-2: 247-257. doi:10.1007/s10847-015-0507-x


Author Clegg, Jack K.
Kim, Yang
Lindoy, Leonard F.
Title Discrete and polymeric supramolecular architectures derived from dinuclear oxovanadium(IV) complexes of aryl-linked bis-diketonato ligands and nitrogen donor co-ligands
Journal name Journal of Inclusion Phenomena and Macrocyclic Chemistry   Check publisher's open access policy
ISSN 0923-0750
1573-1111
Publication date 2015-06
Sub-type Article (original research)
DOI 10.1007/s10847-015-0507-x
Open Access Status Not yet assessed
Volume 82
Issue 1-2
Start page 247
End page 257
Total pages 11
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2016
Language eng
Formatted abstract
Reaction of vanadyl sulfate in aqueous ethanol in the presence of sodium acetate (as base) with the 1,3-aryl-linked bis-β-diketone H2L1 resulted in two dinuclear isomeric complexes of type cis- and trans-[(VO)2L21 ]·0.5H2O that differ in the respective orientations of the oxo groups with respect to the main coordination plane in each complex. Hierarchical adduct formation by each isomer was investigated employing pyridine (py), 4,4′-bipyridine (bpy) and pyrazine (pyz) as co-ligands. Recrystallisation of either cis- or trans-[(VO)2(L1)2] from pyridine resulted in each case in the corresponding cis bis-pyridine adduct in which both pyridine ligands are coordinated on the same side of the V2L2 plane, with the vanadium(IV) centres achieving six-coordination. In contrast, when 4,4′-bipyridine in chloroform was reacted with both isomers and the solutions allowed to evaporate slowly, then a one-dimensional zigzag coordination polymer of type {trans-[(VO)2(L1)2(bpy)]·8CHCl3}n was isolated in each case. Each metal centre is again six-coordinate with the oxo groups oriented trans with respect to the mean V2L2 plane (with the bound pyridyl groups also positioned trans). In parallel experiments when diethyl ether vapour was allowed to diffuse into the respective chloroform solutions then a different, but structurally related, stepped polymer, {trans-[(VO)2(L1)2(bpy)]·2CHCl3}n , was isolated. Reaction of either cis- or trans-[(VO)2(L1)2] with pyrazine followed by slow evaporation produced the same product, identified as {cis-[(VO)2(L1)2(pyz)]}2·4CHCl3·MeCN. In this case two planar dinuclear metallocyclic units are bridged by two pyrazine ligands such that the overall structure is a discrete tetranuclear species.
Keyword Oxovanadium(IV)
Bis-diketone
Heterocyclic base
Metallosupramolecular
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Chemistry and Molecular Biosciences
 
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