The triosmium cluster Os3(CO)12 is a common starting material for osmium cluster synthesis. The activated derivative Os3(CO)11(NCMe) was synthesized using a simple microwave reactor procedure and immediately reacted with substituted acetylenes Ph2C2, PhC2CH3, and (Si(CH3)3)2C2. Products of the acetylene reactions include the dimers (Ph2C2)2Os2(CO)6, (PhC2CH3)2Os2(CO)6, and the cluster HOs3(CO)9C2(SiMe3). While these products have all been previously reported, the traditional synthetic approaches give small yields. We were able to produce them with yields of 45%-55% via microwave heating and obtained the first X-ray crystal structure of (Ph2C2)2Os2(CO)6. The structure of (Ph2C2)2Os2(CO)6 confirms that two acetylene units dimerize and coordinate with one osmium atom in the compound to form an osmacycle.

Microwave-assisted reactions of Os<sub>3</sub>(CO)<sub>12</sub> with substituted acetylenes

247th National Meeting (2014)

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Microwave-assisted reactions of Os3(CO)12 with substituted acetylenes

Microwave-assisted reactions of Os₃(CO)₁₂ with substituted acetylenes