Extended three-dimensional supramolecular architectures derived from trinuclear (bis-beta-diketonato)copper(II) metallocycles

Clegg, Jack K., Lindoy, Leonard F., McMurtrie, John C. and Schilter, David (2006) Extended three-dimensional supramolecular architectures derived from trinuclear (bis-beta-diketonato)copper(II) metallocycles. Dalton Transactions, 25: 3114-3121. doi:10.1039/b517274h

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Author Clegg, Jack K.
Lindoy, Leonard F.
McMurtrie, John C.
Schilter, David
Title Extended three-dimensional supramolecular architectures derived from trinuclear (bis-beta-diketonato)copper(II) metallocycles
Journal name Dalton Transactions   Check publisher's open access policy
ISSN 1477-9226
1477-9234
Publication date 2006-01
Sub-type Article (original research)
DOI 10.1039/b517274h
Open Access Status File (Publisher version)
Issue 25
Start page 3114
End page 3121
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Formatted abstract
Neutral trinuclear (triangular) copper(ii) complexes of type [Cu 3L3] incorporating the 1,4-aryl linked bis-β-diketonato bridging ligands, 1,1-(1,4-phenylene)-bis(butane-1,3- dione) (H2L2), 1,1-(1,4-phenylene)-bis(pentane-1,3-dione) (H2L3) and 1,1-(1,4-phenylene)-bis(4,4-dimethylpentane-1, 3-dione) (H2L4) have been demonstrated to react with selected heterocyclic nitrogen donor bases to generate extended supramolecular architectures whose structures have been confirmed by X-ray diffraction. Thus on reaction with 4,4′-bipyridine (bipy), [Cu3(L2) 3] yields polymeric structures of type {[Cu3(L 2)3(bipy)(THF)]·2.75THF}n and {[Cu 3(L2)3(bipy)(THF)]·bipy·0.75THF} n while with pyrazine (pyz), {[Cu3(L2) 3(pyz)]·0.5THF}n was obtained. Each of these extended structures contain alternating triangle/linker units in a one-dimensional polymeric chain arrangement in which two of the three copper sites in each triangular 'platform' are formally five-coordinate through binding to a heterocyclic nitrogen atom. Interaction of the multifunctional linker unit hexamethylenetetramine (hmt) with [Cu3(L3)3] afforded an unusual, chiral, three-dimensional molecular framework of stoichiometry [Cu3(L3)3(hmt)]n. The latter incorporates the trinuclear units coordinated to three triply bridging hmt units. In marked contrast to the formation of the above structures incorporating bifunctional linker units and five-coordinate metal centres, the trinuclear platform [Cu3(L2)3] reacts with the stronger difunctional base 1,4-diazabicyclo[2.2.2]-octane (dabco) to yield a highly symmetric trigonal columnar species of type {[Cu3(L 4)3(dabco)3]·3H2O} n in which each copper centre is octahedrally coordinated.
Keyword Metal-Complexes
Framework
Ligands
Tetraketones
Chirality
Network
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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