Cyclopentadienyltungsten tricarbonyl dimer
Cyclopentadienyltungsten tricarbonyl dimer is the organotungsten compound with the formula CpW(CO), where Cp is CH. A dark red crystalline solid, it is the subject of research, although it has no or few practical uses. Structure and synthesis. The molecule exists in two rotamers, gauche and anti. The six CO ligands are terminal, and the W-W bond distance is 3.222 Å. The compound is prepared by treatment of tungsten hexacarbonyl with sodium cyclopentadienide followed by oxidation of the resulting NaW(CO)(CH).