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

1 Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal 2 Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, United Kingdom
* Author to whom correspondence should be addressed.
Received: 23 May 2006; Accepted: 14 July 2006 / Published: 17 July 2006
PDF Full-text Download PDF Full-Text [384 KB, uploaded 20 June 2008 16:50 CEST]
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

Article Statistics

Load and display the download statistics.

Citations to this Article

Cite This Article

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.

Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert