Synthesis and X-ray analysis of the tetrahydrido-dianion [H₄Os₁₀(CO)₂₄]^2–, the first non-carbido decaosmium cluster

Abstract

The non-carbido decaosmium cluster dianion [H4Os10(CO)24]2–(1) has been prepared in low yield by heating several trinuclear osmium clusters in isobutyl alcohol; X-ray analysis of the [(Ph3P)2N]+ salt shows that the tetrahydrido-dianion (1) is very similar in structure to the carbido-dianion [Os10C(CO)24]2–(2) indicating that the four hydrido-ligands in (1) may possibly be interstitial in the solid state.