Osmium clusters derived from the reactions of [Os3(CO)10(CH3CN)2] with aminothiazole compounds; X-ray structures of [Os3(μ-H)(CO)10(μ-C8H7N 2S)], [Os3(μ-H)(CO)9(μ3-η2-C 3H5N2S)]

Abstract:

The reaction of [Os<inf>3</inf>(CO)<inf>10</inf>(CH<inf>3</inf>CN)<inf>2</inf>] with aminothiazole compounds, in CH<inf>2</inf>Cl<inf>2</inf> solution at room temperature, leads to the formation of the new hydride carbonyl clusters [Os<inf>3</inf>(μ-H)(CO)<inf>10</inf>(μ-L<inf>n</inf>)] (IA, IIA, IIIA, IVA), (H-L<inf>I</inf>=2-amino-4-methylbenzothiazole, H-L<inf>II</inf>=2-amino-2-thiazoline, H-L<inf>III</inf>=2-aminothiazole, H-L<inf>IV</inf>=2-acetamido-4-methylthiazole). Results from a single-crystal X-ray diffraction analysis for IA shows that the amine group of the ligand is bridging two metal centres of the triangular cluster and revealed a double bond between the nitrogen atom of the amine group and the carbon atom of heterocyclic ring. Thermolysis in refluxing n-octane of the complexes [Os<inf>3</inf>(μ-H)(CO)<inf>10</inf>(μ-L<inf>n</inf>)] results in the elimination of one carbonyl ligand to yield structures of the general type [Os<inf>3</inf>(μ-H)(CO)<inf>9</inf>(μ<inf>3</inf>-η²-L <inf>n</inf>)] (IIB, IIIB, IVB) involving coordination of the nitrogen atom of the heterocyclic ring over the third metallic centre. The crystal structures of IIB and IVB are also described. © 2002 Elsevier Science B.V. All rights reserved.

Año de publicación:

2003

Keywords:

• Aminothiazole compounds
• Clusters complexes
• Crystal structures
• Osmium complexes

Fuente:

scopus