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α-Diimine Chelation at a Triosmium Cluster: Synthesis and X-ray Structure of 1,1-Os3(CO)9(μ-CO)(1,10-phen)

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Abstract

The α-diimine ligand 1,10-phenanthroline (phen) reacts with the activated cluster 1,2-Os3(CO)10(MeCN)2 to afford the carbonyl-bridged cluster 1,1-Os3(CO)9(μ-CO)(phen), which has been characterized by IR and NMR spectroscopies and X-ray diffraction analysis. Replacement of the 1,5-cyclooctadiene (cod) ligand in 1,1-Os3(CO)10(cod) by phen proceeds sluggishly over a 24 h period, showing less than 5% conversion to 1,1-Os3(CO)9(μ-CO)(phen).

Graphical abstract

α-Diimine Chelation at a Triosmium Cluster: Synthesis and X-ray Structure of 1,1-Os 3 (CO) 9 (μ-CO)(1,10-phen)

Bhaskar Poola, Xiaoping Wang, and Michael G. Richmond

The reaction between the triosmium cluster 1,2-Os3(CO)10(MeCN)2 and 1,10-phenanthroline yields 1,1-Os3(CO)9(μ-CO)(phen) at room temperature. The presence of a bridging carbonyl group in the product cluster has been observed by IR spectroscopy and confirmed by X-ray crystallography.

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Acknowledgment

Financial support from the Robert A. Welch Foundation (Grant B-1093-MGR) is appreciated.

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Authors and Affiliations

  1. Department of Chemistry, University of North Texas, Denton, TX, 76203, USA

    Bhaskar Poola, Xiaoping Wang & Michael G. Richmond

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  1. Bhaskar Poola
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  2. Xiaoping Wang
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  3. Michael G. Richmond
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Correspondence to Xiaoping Wang.

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Poola, B., Wang, X. & Richmond, M.G. α-Diimine Chelation at a Triosmium Cluster: Synthesis and X-ray Structure of 1,1-Os3(CO)9(μ-CO)(1,10-phen). J Chem Crystallogr 37, 641–644 (2007). https://doi.org/10.1007/s10870-007-9225-6

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  • DOI: https://doi.org/10.1007/s10870-007-9225-6

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