Chelation Kinetics of Bidentate Phosphine Ligands on Pentacoordinate Ruthenium Carbonyl Complexes

Chelation kinetics of the complexes Ru(CO)4(η1-(P−P)) have been studied in heptane, where P−P = Ph2P(CH2) n PPh2 (n = 1, 2, 3, or 4, i.e., dppm, dppe, dppp, or dppb), Ph2P(NMe)PPh2 (dppma), Ph2P(o-C6H4)PPh2 (dpp-benzene), or R2P(CH2)2PR2 (R = Me or Cy, i.e., dmpe or dcpe). The complexes were prepared in situ by reaction of the bidentate ligands with Ru(CO)4(C2H4), which itself was prepared in situ by photolysis of Ru3(CO)12 under C2H4. The …