New U- and Y-shaped components for metallosupramolecular assemblies: synthesis and coordination chemistry of 2,6-bis(3-pyridyloxy)pyrazine
- 6 August 2002
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 17,p. 3321-3326
- https://doi.org/10.1039/b202593k
Abstract
The new ligand 2,6-bis(3-pyridyloxy)pyrazine (1) has been prepared and characterized. The ligand has inherent flexibility due to the two ether linkages and its ability to act as either a U-shaped, Y-shaped or W-shaped component in the preparation of metallosupramolecular assemblies has been assessed by reactions of 1 with late transition metal ions. Reaction with Cu(NO3)2 gives a discrete dimetallacyclic complex, with the ligand acting as a U-shaped component by binding through only the pyridine donors, and contains a rare Cu2(μ-ONO2)2 unit. Reaction with CuI also gives a discrete dimetallacyclic complex, with the ligand again acting as a U-shaped component, and the complex containing a central Cu2(μ-I)2 unit. Reaction with [Cu(CH3CN)4]BF4 gives the first example of a chiral 2-dimensional [6∶3] metallopolymeric net species, with the ligand acting as a Y-shaped component by binding through both the pyridine and pyrazine donors. Reaction with AgNO3 gives a centrosymmetric 2-dimensional [6∶3] metallopolymeric net species, with the ligand again acting as a Y-shaped component.Keywords
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