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

Barnett, S. A., Blake, A. J., Champness, N. R., Nicolson, J. E.B. and Wilson, C. (2001) 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. Journal of the Chemical Society: Dalton Transactions, 2001(5), pp. 567-573. (doi:10.1039/b008715g)

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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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wilson, Dr Claire
Authors: Barnett, S. A., Blake, A. J., Champness, N. R., Nicolson, J. E.B., and Wilson, C.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of the Chemical Society: Dalton Transactions
Publisher:Royal Society of Chemistry
ISSN:0300-9246
ISSN (Online):2050-5671
Published Online:09 February 2001

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