Synthesis and structural determination of the stable dinuclear carbonyl-phosphite rhodium(0) complex: (CO)2(P(O-o-tBuPh)3)Rh-Rh(P(O-o-tBuPh)3)(CO)3

[Rh(µ-OMe)(COD)]2 reacts with tris-ortho-tert-butylphenylphosphite in the presence of carbon monoxide to provide the first example of a stable dinuclear carbonyl-phosphite rhodium(0) complex with a metal–metal bond distance of 2.73(1) Å. The geometry at the metals is different: square planar and distorted trigonal bipyramid. The crystallographic data indicate that two of the carbonyl ligands are semi-bridged between the two rhodium atoms.