Crystal and Molecular Structures of t-Butyl Isocyanide-Undecacarbonyl-Tetrahydrido-Tetraruthenium, Ru4(µ-H)4(CO)11(CNBu t )

Abstract

The crystal and molecular structures of Ru₄(µ-H)₄(CO)₁₁(CNBu^t) (2), obtained with Ru₄(µ- H)₄(CO)₁₀(CNBu^t)₂ by hydrogenation of Ru₅(µ₅-CNBu^t)(CO)₁₄(CNBu^t) (1), have been determined. Crystals of (2) are monoclinic, space group P 21/c, with a 12·349(1), b 11·627(3), c 17·0222(7) Å, β 105·785(4)°, V 2351·9(6) ų and Z 4. The structure was solved by direct methods and refined using 4478 reflections to final R 0·028(R_w0·033). An improved procedure for the preparation of (1) in 35–40% yields is also described.