REACTIONS OF TRANSITION METAL ACETYLIDES VI. SOME ADDITION REACTIONS OF SUBSTITUTED STYRENES WITH Ru(C2R)(L)2(ν-C5H5) (R = Me OR Ph; L2 = (CO, PPh3), (PPh3)2 OR (dppe)). X-RAY CRYSTAL STRUCTURE OF RuCPh=CH(C6H4NO2-4)>(dppe)(ν-C5H5)*0.5CH2Cl2

Article abstract of DOI:10.1016/0022-328X(86)82044-7

Further studies of the reactions between ruthenium ?-acetylide complexes and electrophilic olefins CHAr=C(CN)(X) (Ar = C6H4NO2-4, Ph; X = CN; Ar = C6H4NO2-4, X = CO2Et) have shown the formation of allylic, butadienyl and in one case, cyclobutenyl complexes.The direction of addition is such that the =C(CN)(X) group becomes attached to the α-carbon of the acetylide.This is confirmed by the X-ray structure of RuCPh=CH(C6H4NO2-4)>(dppe)(ν-C5H5)*0.5CH2Cl2, crystals of which are monoclinic, space group C2/c with cell dimensions a 28.81(1), b 9.661(2), c 30.782(8) Angstroem, β 95.02 (3)deg, and Z = 8.The structure was refined by a least-squares procedure with the use of 4291 statistically significant reflections < I > 2.5?(I)> to R 0.075 and R_w 0.076.