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Molecules 2006, 11(12), 940-952; doi:10.3390/molecules11120940
Article

Microwave Assisted Synthesis of Molybdenum and Tungsten Tetracarbonyl Complexes with a Pyrazolylpyridine Ligand. Crystal structure of cis-[Mo(CO)4{ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate}]

1, 1, 2
,
1 and 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.
Received: 17 November 2006 / Revised: 4 December 2006 / Accepted: 5 December 2006 / Published: 6 December 2006
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Abstract

We report the one-step syntheses in good yields of the complexes cis-[M(CO)4(pzpy)] {M = Mo, W; pzpy = ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate} directlyfrom the corresponding M(CO)6 starting materials by using microwave-assisted heatingand reaction times of either 30 s (M = Mo) or 15 min (M = W). The structure of themolybdenum tetracarbonyl complex was determined by single crystal X-ray diffraction.The compound is monomeric and the molybdenum atom has a highly distorted octahedralgeometry. The close packing of the individual cis-[Mo(CO)4(pzpy)] species is essentiallydriven by the need to fill the space effectively, closely mediated by weak C–H···O andπ···π interactions.
Keywords: Tetracarbonyl metal complexes; pyrazolylpyridine ligand; microwave synthesis; X-ray structure Tetracarbonyl metal complexes; pyrazolylpyridine ligand; microwave synthesis; X-ray structure
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Coelho, A.C.; Almeida Paz, F.A.; Klinowski, J.; Pillinger, M.; Gonçalves, I.S. Microwave Assisted Synthesis of Molybdenum and Tungsten Tetracarbonyl Complexes with a Pyrazolylpyridine Ligand. Crystal structure of cis-[Mo(CO)4{ethyl[3-(2-pyridyl)-1-pyrazolyl]acetate}]. Molecules 2006, 11, 940-952.

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