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Crystals 2014, 4(1), 32-41; doi:10.3390/cryst4010032
Article

Dimensionality Variation in Dinuclear Cu(II) Complexes of a Heterotritopic Pyrazolate Ligand

1,2,*  and 1,*
1 MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand 2 School of Chemistry, Monash University, Clayton, VIC 3800, Australia
* Authors to whom correspondence should be addressed.
Received: 21 January 2014 / Revised: 6 February 2014 / Accepted: 10 February 2014 / Published: 26 February 2014
(This article belongs to the Special Issue Crystal Engineering Involving Weak Bonds)
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Abstract

Two new Cu(II) complexes of the ligand 3-carboxy-5-(2-pyridyl)-1H-pyrazole, H2L1, have been prepared and structurally characterized and found to be comprised of a similar [M2L2] dimer motif. Subtle variation in the synthetic conditions allowed isolation of two metal complexes: [Cu2L12(MeOH)2], 1, a discrete dimer linked by hydrogen bonding interactions in the solid state, and poly-[Cu2L12], 2, a polymeric material where the dimer motif is linked by carboxylate bridges to give an extended two-dimensional sheet. The selective isolation of each phase by careful synthetic control highlights the subtlety and importance of the underlying synthetic conditions.
Keywords: heterocycles; crystallography; metallosupramolecular chemistry; crystal engineering heterocycles; crystallography; metallosupramolecular chemistry; crystal engineering
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hawes, C.S.; Kruger, P.E. Dimensionality Variation in Dinuclear Cu(II) Complexes of a Heterotritopic Pyrazolate Ligand. Crystals 2014, 4, 32-41.

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