Oxidative addition of allylic halides to ruthenium(II) compounds. Preparation, reactions, and X-ray crystallographic structure of ruthenium(IV)-allyl complexes

Article abstract of DOI:10.1021/om00117a041

This paper describes the successful preparation of new Ru(IV)-π-allyl complexes having the general formula (C₅R₅)RuX₂(η³-allyl) (R = H, Me; X = Cl, Br) by the oxidative addition of allylic halides to Ru(II) complexes, (C₅R₅)Ru(L)₂X (R = H, Me; L = CO, PPh₃; X = Br, Cl). These new compounds were subjected to NMR analysis to determine the structure, which was confirmed by X-ray crystallographic analysis of a representative compound. During the course of this study, the authors found facile reductive elimination of allylic halides from the Ru(IV)-π-allyl complexes to form Ru(II)-carbonyl or Ru(II)-arene complexes, induced by contact with CO or aromatic solvents, respectively.