Organochromium π-complexes—VII. The reactions of Cp(η3-allyl)2Cr compounds with alkynes and alkenes
作者:K. Angermund、P. Betz、A. Döhring、P.W. Jolly、C. Krüger、K.U. Schönfelder
DOI:10.1016/s0277-5387(00)80116-3
日期:1993.11
The compounds (eta-RC5H4)(eta3-C3H5)2Cr (R = H, Me, t-C4H9) and (eta5-indenyl)(eta3-C3H5)2Cr react with alkynes (RC2R) with displacement of 1,5-hexadiene to give Cp'(eta6-R6C6)Cr species. Treatment with cyclooctatetraene gives compounds containing an eta6-C8H8 group while the final product of the reaction with cycloheptatriene contains an eta7-cycloheptatrienyl fragment. 1,3-Butadiene reacts with dimerization to give the diamagnetic, dinuclear species (Cp'Cr)2(mu-eta3,eta3-C8H12). The molecular structures Cp(eta6-Me6C6)Cr, (eta5-indenyl)(eta6-Me6C6)Cr and Cp(eta6-C8H8)Cr have been confirmed by X-ray diffraction.