Molecules 2006, 11(7), 528-538; doi:10.3390/11070528
Article

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

Received: 23 May 2006; Accepted: 14 July 2006 / Published: 17 July 2006
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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
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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.

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.

Chicago/Turabian Style

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

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