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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 (CC BY 3.0).

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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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