Crystal structure of bis-[(η 5 - tert -butyl-cyclo-pentadien-yl)tri-carbonyl-molybdenum(I)]( Mo - Mo ).

The dinuclear mol-ecule of the title compound, [Mo 2 (C 9 H 13 ) 2 (CO) 6 ] or [Mo( t BuCp)(CO) 3 ] 2 where t Bu and Cp are tert -butyl and cyclo-penta-dienyl, is centrosymmetric and is characterized by an Mo-Mo bond length of 3.2323 (3) Å. Imposed by inversion symmetry, the t BuCp and the carbonyl ligands are in a transoid arrangement to each other. In the crystal, inter-molecular C-H⋯O contacts lead to the formation of layers parallel to the bc plane.