Cyclopentadienylchromium tricarbonyl dimer
Cyclopentadienylchromium tricarbonyl dimer is the organochromium compound with the formula CpCr(CO), where Cp is CH. A dark green crystalline solid. It is the subject of research it exists in measureable equilibrium quantities with the monometallic radical CpCr(CO). Structure and synthesis. The six CO ligands are terminal, and the Cr-Cr bond distance is 3.281 Å, 0.06 Å longer than the related dimolybdenum compound. The compound is prepared by treatment of chromium hexacarbonyl with sodium cyclopentadienide followed by oxidation of the resulting NaCr(CO)(CH).