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Trimeric M 3 (CO) 12 (M = Ru, Os) reacts with typical inorganic oxidants to unwanted side products. Yet, the 9,10-dichlorooctafluoroanthracene radical cation deelectronates these under CO pressure to give the first homotrimetallic M 3 (CO) 14 2+ salts.
Sellin et al. (Sat,) studied this question.