An unusually clear demonstration of the ease of addition of two-electron donor ligands to the title complex 1 is provided by the molecular structure shown on the right. Complex 1 is readily accessible from [{Cp*RuOMe}2] and acetylacetone. The air-sensitive, intensely red complex 1 adds CO and phosphane very rapidly and can be cleaved with cations such as Zn2⊕ and Mg2⊕ to give the very versatile Cp*Ru⊕ fragment.
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Kölle et al. (1990) studied this question.
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