Alkyne and CO coupling reactions in dimanganese carbonyl complexes. The reactions of Mn[sub 2](CO)[sub 9](NCMe) with HC[triple bond]CCO[sub 2]Me
- Univ. of South Carolina, Columbia, SC (United States)
Four compounds Mn[sub 2](CO)[sub 8][[mu]-O=C[C(H)=C(CO[sub 2]Me)][sub 2]], 2, 35%, (OC)[sub 4]Mn[trans-[mu]-HC=C(CO[sub 2]Me)]Mn(CO)[sub 5], 3, 3%, (OC)[sub 4]Mn[C(CO[sub 2]Me)=C(H)C(=O)C(H)=C(CO[sub 2] Me)C(H)=C(CO[sub 2]Me)]Mn(CO)[sub 4], 4, 20%, and (OC)[sub 4]Mn[C(CO[sub 2]Me)-C(H)C(=O)C(H)=C(CO[sub 2]Me) C(H) =CH(CO[sub 2]Me)], 5, 5% yield, were obtained from the reaction of Mn[sub 2](CO)[sub 9](MeCN), 1, with HC[triple bond]CCO[sub 2]Me in hexane solvent at 25[degrees]C. Compounds 3-5 are new. Compound 3 is a dimetalated olefin complex formed by the insertion of the alkyne into the metal-metal bond of 1. Compounds 4 and 5 were characterized by a single-crystal X-ray diffraction analysis. Compound 4 contains two metallacyclic rings (one five membered and one six membered) formed by the coupling of three alkynes to one CO ligand. In the five membered ring the oxygen atom of the CO-derived carbonyl group is coordinated to one of the metal atoms. The six membered ring was formed by one of the alkynes and a coordinated carboxylate group from one of the alkynes coupled to it. 9 refs., 2 figs., 7 tabs.
- OSTI ID:
- 5425037
- Journal Information:
- Organometallics; (United States), Journal Name: Organometallics; (United States) Vol. 12:10; ISSN ORGND7; ISSN 0276-7333
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ALKYNES
CARBONYLS
CHEMICAL REACTIONS
COMPLEXES
COUPLING
CRYSTAL STRUCTURE
HYDROCARBONS
LIGANDS
MANGANESE COMPLEXES
MOLECULAR STRUCTURE
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES