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Article

Synthesis and Structure of a Sodium Complex of an Aromatic β-Diketone and Pyrazolylpyridine

by
Ana C. Coelho
1,
Filipe A. Almeida Paz
1,
Jacek Klinowski
2,
Martyn Pillinger
1 and
Isabel S. Gonçalves
1,*
1
Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
2
Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK
*
Author to whom correspondence should be addressed.
Molecules 2006, 11(7), 528-538; https://doi.org/10.3390/molecules11070528
Submission received: 23 May 2006 / Accepted: 14 July 2006 / Published: 17 July 2006
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Abstract

Reaction of NaH with a THF solution of Eu(BTA)3(pypzH) [BTA = 1-benzoyl-3,3,3-trifluoroacetonate, pypzH = 2-(3-pyrazolyl)pyridine] leads to the formation of theeuropium-free tetrasodium complex [Na4(pypzH)2(μ4-BTA)2(μ2-BTA)2]. Single-crystal X-ray diffraction studies revealed the presence of a centrosymmetric Na hybrid tetramer,which fully occupies the contents of the triclinic unit cell. The crystal structure containstwo individual Na cations, Na(1) and Na(2), which have highly irregular {NaN2O3} and{NaO6} local coordination environments, respectively. One of the key features is thepresence of a central {Na4O6} core, which is unprecedented for Na . Externally to this{Na4O6} cluster pyrazolylpyridine organic molecules are N,N-chelated to Na(1). Eventhough all of the organic residues contain aromatic rings, the crystal packing of individualcentrosymmetric tetrasodium [Na4(pypzH)2(μ4-BTA)2(μ2-BTA)2] molecular moieties isessentially driven through geometrical aspects combined with weak C–H···π interactions,rather than the expected a priori π-π interactions. The material also contains classicalstrong hydrogen bonds, even though these do not directly contribute to the packingdriving forces.
Keywords: Sodium; bridging ligands; N ligands; O ligands; coordination modes; aggregation Sodium; bridging ligands; N ligands; O ligands; coordination modes; aggregation

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MDPI and ACS Style

Coelho, A.C.; Almeida Paz, F.A.; Klinowski, J.; Pillinger, M.; Gonçalves, I.S. Synthesis and Structure of a Sodium Complex of an Aromatic β-Diketone and Pyrazolylpyridine. Molecules 2006, 11, 528-538. https://doi.org/10.3390/molecules11070528

AMA Style

Coelho AC, Almeida Paz FA, Klinowski J, Pillinger M, Gonçalves IS. Synthesis and Structure of a Sodium Complex of an Aromatic β-Diketone and Pyrazolylpyridine. Molecules. 2006; 11(7):528-538. https://doi.org/10.3390/molecules11070528

Chicago/Turabian Style

Coelho, Ana C., Filipe A. Almeida Paz, Jacek Klinowski, Martyn Pillinger, and Isabel S. Gonçalves. 2006. "Synthesis and Structure of a Sodium Complex of an Aromatic β-Diketone and Pyrazolylpyridine" Molecules 11, no. 7: 528-538. https://doi.org/10.3390/molecules11070528

APA Style

Coelho, A. C., Almeida Paz, F. A., Klinowski, J., Pillinger, M., & Gonçalves, I. S. (2006). Synthesis and Structure of a Sodium Complex of an Aromatic β-Diketone and Pyrazolylpyridine. Molecules, 11(7), 528-538. https://doi.org/10.3390/molecules11070528

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