Abstract
X-ray crystallographic structures of η3-allylpalladium and -platinum complexes bearing an acetal group at the 2-position {[M(η3-CH2C(OCH2OCH3)CH2)(PPh3)2](PF6) (M = Pd (1a), Pt (1b)) and [M(η3-CH2C(O-2-C5H9O)CH2)(PPh3)2](PF6) (M = Pd (2a), Pt (2b))} reveal that they have a large contribution of oxonium structure, regardless of the kind of metal. Depending on the structure of the acetal moiety, these η3-allyl complexes show different reactivities toward hydroxide and methoxide ion as nucleophiles. The generation mechanism of oxodimethylenemethane complexes {[M(η3-CH2C(O)CH2)(PPh3)2](PF6) (M = Pd (3a), Pt (3b))} from these acetal compounds was discussed on the basis of the X-ray crystallographic structures, the analysis of reaction products, and the 18O isotope-labeling technique. Nucleophilic displacement at the 2-position of η3-allylpalladium complexes was directly proved for the first time by the isotope technique.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
