Synthesis and Characterization of New Os25+ and Os26+ Azido Complexes |
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| Authors: | Paula M. B. Piccoli John F. Berry |
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| Affiliation: | (1) Department of Chemistry, University of Wisconsin—Madison, 1101 University Ave, Madison, WI 53706, USA; |
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| Abstract: | Reaction of Os2(OAc)4Cl2 with an excess of HDPhF (HDPhF = N,N′-diphenylformamidine) gives a high yield of Os2(DPhF)4Cl2 (1), which can be converted to its azido analog, Os2(DPhF)4(N3)2 (3), by treatment with NaN3. We report a major improvement on the preparation of Os2(chp)4Cl (2; Hchp = 2-chloro-6-hydroxypyridine) by synthesizing the compound in the reducing solvent ethanol. Reaction of 2 with NaN3 affords the azido complex Os2(chp)4N3 (4). Compound 3 has been examined by X-ray crystallography, and has an Os–Os bond distance of 2.45 Å, suggesting a (π*)2 ground state for the molecule. |
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