Pyrolysis of [Ru3(CO)10(dppe)]: activation of C?H and P?Ph bonds.: The crystal structure and dynamical behavior of [Ru4(CO)9(?-CO){?4?2-PCH2CH2P(C6H5)2}(?4?4-C6H4)]
Sánchez Cabrera, Gloria
2002
Pyrolysis of [Ru4(CO)10(dppe)]: Activation of C-H and P-Ph Bonds. The Crystal Structure and Dynamical Behavior of [Ru4(CO)9(m-CO){m4-h2-PCH2CH2P(C6H5)2}(m4-h4-C6H4)]. Gloria Sánchez-Cabrera, Francisco J. Zuno-Cruz, María J. Rosales-Hoz and Vladimir I. Bakhmutov. J. Organomet. Chem. (2002), 660, 153-160. ISSN 0022-328X.
Abstract
The pyrolysis reaction of [Ru3(CO)10(dppe)], compound 1, in toluene yields as the main product [Ru4(CO)9(?-CO){?4?2-PCH2CH2P(C6H5)2}(?4?4-C6H4)], compound 2. The X-ray structure of 2 shows a benzyne group coordinated to a square of ruthenium atoms and a ?4?2-PCH2CH2PPh2 fragment. Variable-temperature NMR experiments showed three independent dynamic processes: a rotation of the benzyne group, CO migration and a twisting movement of the CH2?CH2 fragment. The thermolysis of [Ru3(CO)10(dfppe)], compound 3, (dfppe=1,2-bis(dipentafluorophenylphosphino)ethane, carried out under the same conditions, showed 3 to be stable.
