Wenzel AG1, Blake G, VanderVelde DG, Grubbs RH.
J Am Chem Soc. 2011 Apr 27;133(16):6429-39. doi: 10.1021/ja2009746. Epub 2011 Mar 31.The reaction of the phosphonium alkylidene [(H(2)IMes)RuCl(2)=CHP(Cy)(3))](+) BF(4)(-) with propene, 1-butene, and 1-hexene at -45 °C affords various substituted, metathesis-active ruthenacycles. These metallacycles were found to equilibrate over extended reaction times in response to decreases in ethylene concentrations, which favored increased populations of α-monosubstituted and α,α'-disubstituted (both cis and trans) ruthenacycles. Read More