Reactions of heteronuclear dimetalated olefin complexes. Reactions of CpFe-(CO){sub 2}[{mu}-(Z)-(MeO{sub 2}C)C=C(CO{sub 2}Me)]Re -(CO){sub 4} with CO and p-tolyl isothiocyanate
- Univ. of South Carolina, Columbia, SC (United States)
Addition of CO to the dimetalated olefin complex CpFe(CO){sub 2} [{mu}-(Z)-(MeO{sub 2}C)C=C(CO{sub 2}Me)]-Re(CO){sub 4}, 1, at 25{degree}C/700 psi of CO resulted in the formation of the adduct CpFe(CO){sub 2}[{mu}-(E)-(MeO{sub 2}C)C=C(CO{sub 2}Me)]-Re(CO){sub 5} , 2, in 52% yield by cleavage of the Re-O bond to the coordinated carboxylate group. In contrast the reaction of 1 with CO at 70{degree}C/ 900 psi of CO provided the new compound CpFe(CO){sub 2} [{mu}-(Z)-C=O(MeO{sub 2}C)C=C(CO{sub 2}Me)]-Re(CO){sub 4}, 3, in 77% yield. Compounds 2 and 3 were characterized by single-crystal X-ray diffraction analyses. Compound 2 is a Z-dimetalated olefin formed by addition of CO to the Re(CO){sub 4} group in 1, C-C = 1. 35(1) Hi. Compound 3 is an isomer of 2 in which a CO was added to 1 and inserted into the iron-carbon bond to the alkyne. Compound 1 reacts with EtNH{sub 2} or H{sub 2}O to yield the new compound CpFe(CO){sub 2}[(MeO{sub 2}C)C=C(CO{sub 2}Me)(H)], 6, by the cleavage of the rhenium grouping from the molecule. The reaction with H{sub 2}O is catalyzed by silica gel. 22 refs., 3 figs., 6 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 136091
- Journal Information:
- Organometallics, Vol. 14, Issue 10; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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