104229-88-1Relevant articles and documents
Co-ordination of Highly Substituted Alkenes to Transition-metal Complexes: Preparation and Crystal and Molecular Structures of the Complexes 2> and 2>
Cupertino, Domenico C.,Cole-Hamilton David J.
, p. 443 - 450 (2007/10/02)
Reaction of Ph2PCl with RR'C=CR"C(X)OH in the presence of triethylamine produces Ph2POC(X)CR"=CRR' (X = O; R = R' = Me, R" = H; R = R" = H, R' = Me; R = R" = H, R' = CH=CHMe; R = Ph, R' = H, R" = Me; X = H2, R = R' = Me, R" = H) in high yield.These ligands react with 2)2> (L = C2H4 or cyclo-octene) to give high yields of 2> in which the ligands are bound through phosphorus and the double bond.The new compounds have been fully characterised by spectroscopic means, as well as by the crystal structures of 2> and 2>.Crystal data: for 2>, monoclinic, a = 8.485(!), b = 28.070(3), c = 14.253(1) Angstroem, β = 93.96(1) deg, space group P21/n; for 2>, monoclinic, a = 17.372(2), b = 22.070(1), c = 9.986(2) Angstroem, β = 104.51(1) deg, space group P21/a.Both complexes contain dimeric structures with bridging chlorine atoms.Each rhodium atom is in an approximately square-planar configuration, and is bonded to two chlorine, one phosphorus atom, and one ?-bonded C=C double bond, the phosphorus and ? system being part of a chelate ring structure.In 2> the α,β unsaturated linkage is bonded to the rhodium only, the γ,δ double bond being free.
