106625-47-2Relevant academic research and scientific papers
Metallacyclic metaloxycarbene complexes from 1,2-didehydrobenzene group 4 metallocenes and metal carbonyls
Erker, Gerhard,Dorf, Ulrich,Lecht, Rainer,Ashby, Michael T.,Aulbach, Michael,Schlund, Rüger,Krüger, Carl,Mynott, Richard
, p. 2037 - 2044 (2008/10/08)
Thermally generated (η2-1,2-didehydrobenzene)titanocene and -zirconocene react with hexacarbonylmolybdenum or -tungsten at 90°C to give five-membered metallacyclic titan- and zirconoxycarbene complexes 4. The carbene complex Cp2ZrOC[
Uncommon structural features of [Cp2Zr-OC(Ph)-Mo(CO)5]2O, a Zr-O-Zr-bridged tetranuclear bis(carbene)metal complex exhibiting a planar σ-framework
Erker, Gerhard,Dorf, Ulrich,Krüger, Carl,Tsay, Yi-Hung
, p. 680 - 682 (2008/10/08)
Thermally in situ generated (η2-1,2-didehydrobenzene)zirconocene reacts with M(CO)6 (M = W, Mo) to give the benzannelated five-membered metallacyclic zirconoxycarbene complexes 4a,b. Controlled hydrolysis of 4a (M = W) with CuSO4·5H2O yields the tetranuclear Zr-O-Zr-bridged bis(carbene) complex [(CO)5W-C(Ph)O-Cp2Zr-O-ZrCp2-OC(Ph)-W(CO) 5] (5a). The molecular structure of the molybdenum analogue 5b was determined by X-ray diffraction. 5b crystallizes in the monoclinic space group C2/c with cell parameters a = 28.666 (5) A?, b = 11.257 (2) A? c = 16.884 (2) A?, and β = 125.84 (1)°. 5b is characterized by a completely planar σ-framework (Zr-O-Zr* = 180°). The most remarkable structural feature of 5b is the trans arrangement of the voluminous (CO)5Mo-carbene units at the Zr-O-Zr bridge. This favored antiperiplanar conformation is unique among the family of early-transition-metal Cp2M(X)-O-M(X)Cp2 compounds.
