Crystal and molecular structure of di-µ-carbonyl-dicarbonyl(π-cyclopentadienylnickelio)(tris-p-fluorophenylphosphine)cobalt

Abstract

The crystal structure of the title compound has been determined by X-ray diffraction methods from counter data. Refinement to R 0·071 for 2464 reflections was carried out by a least-squares procedure. The monoclinic unit cell, space group I2/a, has dimensions a= 16·396 ± 0·042, b= 10·663 ± 0·058, c= 29·260 ± 0·084 Å, β= 91·1 ± 0·1 °, for Z= 8. The dimer molecule has a non-planar Ni(CO)₂Co bridging system, the angle between the two Ni(CO)Co planes being 133·9°. The metal to bridge-carbon distances are not equivalent: Co–C_b 1·90(1) and 2·03(1), and Ni–C_b 1·89(1) and 1·82(1)Å. Ni ⋯ Co is 2·425(2) and Co–P is 2·243 Å.