286434-19-3Relevant academic research and scientific papers
Binuclear CpV, Cp*V, and Cp*Ta complexes containing organochalcogenolato bridges, μ-ER (E = sulfur, selenium, tellurium; R = methyl, phenyl, and ferrocenyl)
Herberhold, Max,Peukert, Juergen,Krueger, Michaela,Daschner, Daniela,Milius, Wolfgang
, p. 1289 - 1295 (2000)
Photolysis of the halfsandwich tetracarbonylmetal complexes CpV(CO)4, Cp*V(CO)4 and Cp*Ta(CO)4 in solution in the presence of di(organyl)dichalcogenides E2R2 (E = S, Se, Te; R = Me, Ph, Fc) leads to diamagnetic doubly organochalcogenolato-bridged compounds, [Cp0M(CO)2(μ-ER)]2. According to the X-ray structure determinations carried out for [CpV(CO)2(μ-TeMe)]2, [Cp*V(CO)2(μ-TePh)]2 and [Cp*Ta(CO)2(μ-SPh)]2, the molecular framework consists of a folded M2(μ-ER)2 ring with the cyclopentadienyl ligands in cis-configuration and the organyl substituents R in a syn-equatorial arrangement, thus forming a bowl-shaped molecule with the four terminal CO ligands protruding into the inner sphere. The M ... M distances (in the range between 305 and 330pm) are not considered to indicate direct bonding interactions. The vanadium complexes [Cp0V(CO)2(μ-ER)]2 are completely decarbonylated in the presence of an excess of E2R2 in boiling toluene, and in many cases the paramagnetic quadruply-bridged products, [CpV(μ-ER)2]2, can be isolated.
