title: Synthesis of Ru alkylidene complexes.
abstract: The present work describes the robust synthesis of Ru alkylidene complexes (PCy(3))(2)Cl(2)Ru=CHR - precursors for metathesis catalysts. Moreover, the dynamic behavior of complexes where R = 2-naphthyl and 2-thienyl was studied. (1)H NMR techniques were employed to establish the preferred conformations in solution for both complexes and the energy barrier for rotation around single (Ru=)CH-C(thienyl) bond was estimated (ΔG(≠) (303K) = 12.6 kcal/mol).
authors.affiliation: Evonik Degussa GmbH, Rodenbacher Chaussee 4, 63457 Hanau-Wolfgang, Germany.
authors.forename: Renat
authors.initials: R
authors.lastname: Kadyrov
authors.forename: Anna
authors.initials: A
authors.lastname: Rosiak