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Issue 5, 2001
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Synthesis and structural characterisation of cadmium(II) and zinc(II) coordination polymers with an angular dipyridyl bridging ligand: parallel interpenetration of two-dimensional sheets with 4.82 topology

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Abstract

Coordination polymers formed between Cd(NO3)2 or Zn(NO3)2 and 2,4-bis(4-pyridyl)-1,3,5-triazine (dpt) have been synthesized and their single crystal structures determined. Reaction of a 1  1 ratio of Cd(NO3)2 with dpt in MeCN–CH2Cl2 affords the complex [Cd2(NO3)4(dpt)2(MeCN)] 1 which exists as a doubly interpenetrated 4.82 two-dimensional sheet in the solid state. Each sheet is constructed from nitrate-bridged [Cd(dpt)]4 metallacycles. In sharp contrast the analogous reaction performed using a 2  1 L  M ratio affords the discrete molecular complex [Cd(NO3)2(dpt)2(MeCN)] 2 in which both dpt ligands act as terminal donors rather than bridging metal centres. Reaction of Cd(NO3)2 with dpt in EtOH–CH2Cl2 affords a one-dimensional coordination polymer [Cd(NO3)2(dpt)(EtOH)] 3. Zn(NO3)2 reacts with dpt in either a 1  1 or 2  1 L  M ratio to afford the one-dimensional polymer [Zn(NO3)2(dpt)] 4 which can be isolated as two polymorphs 4a and 4b which differ in their nitrate binding modes. The product formed is independent of the L  M ratio used in the reaction. Only 4a is formed when MeCN–CH2Cl2 is used as reaction solvent whereas both 4a and 4b are formed from either EtOH–CH2Cl2 or iPrOH–CH2Cl2.

Graphical abstract: Synthesis and structural characterisation of cadmium(II) and zinc(II) coordination polymers with an angular dipyridyl bridging ligand: parallel interpenetration of two-dimensional sheets with 4.82 topology [ ]

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Article information


Submitted
30 Oct 2000
Accepted
20 Dec 2000
First published
09 Feb 2001

J. Chem. Soc., Dalton Trans., 2001, 567-573
Article type
Paper

Synthesis and structural characterisation of cadmium(II) and zinc(II) coordination polymers with an angular dipyridyl bridging ligand: parallel interpenetration of two-dimensional sheets with 4.82 topology

S. A. Barnett, A. J. Blake, N. R. Champness, J. E. B. Nicolson and C. Wilson, J. Chem. Soc., Dalton Trans., 2001, 567
DOI: 10.1039/B008715G

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