The complex of the title compound, [CO2(CO)(6)(C9H21O3P)(2)].CH2Cl2, l
ies about an inversion centre and displays trigonal bipyramidal coordi
nation geometry about each Co atom, with axial phosphite ligands trans
to the Co-Co bond. The Co-Co bond length of 2.6544(12) Angstrom in th
is structure is shorter than Co-Co bond lengths reported for analogous
phosphine complexes.