Abstract
AbstractTwo products, Mn2(CO)7(PMe2Ph)[μ‐η2‐η2‐MeO2C(H)CCC‐(H)CO2Me] (1) in 9% yield and Mn2(CO)6(PMe2Ph)[μ‐η3‐η1‐MeO2CC(H)CC(H)CO2Me] (2) in 34% yield, were obtained from the reaction of Mn2(CO)8(PMe2Ph)(MeCN) with MeO2C(H)C=C=C(H)CO2Me. Compound 1 contains a bridging η2‐η2‐MeO2C(H)CCC(H)CO2Me allene ligand and compound 2 contains a bridging η3‐η1‐MeO2C(H)CCC(H)‐CO2Me allene ligand in which the oxygen atom of one of the carbonyl groups is also coordinated. Compound 1 slowly converts to 2, which establishes that it is a precursor to 2. Compound 2 reacts with NEtH2 to give the mononuclear manganese complex fac‐Mn(CO)3(PMe2Ph)[MeO2CCH2‐C=C(H)CO2Me] (3) in 96% yield. Compound 3 contains a chelating 1,3‐di(methoxycarbonyl)propenyl grouping formed by addition of a hydrogen atom to the allene and the loss of a manganese grouping. Compounds 1–3 were characterized by single crystal x‐ray diffraction methods.
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.
