Substitution reactions of dinuclear alkenyl-bridged iron-cobalt complexes with phosphines. Crystal structures of [(CO)<inf>3</inf> Fe-Co(CO)<inf>2</inf>(PMe<inf>2</inf>Ph)] (μ-C(CO<inf>2</inf>Me)C(CO<inf>2</inf>Me)H) and [(CO)<inf>2</inf>(PMe<inf>2</inf>Ph)FeCo(CO)<inf>2</inf>(PMe<inf>2</inf>Ph)]-(μ-C(CO)<inf>2</inf>Me)C(CO<inf>2</inf>Me)H)

Isabel Moldes, Josep Ros, René Mathieu, Xavier Solans, Mercè Font-Bardía

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9 Citations (Scopus)

Abstract

The bridging alkenyl iron-cobalt complexes [(CO)4FeCo(CO)3(μ-CR1CR2H) (R1CO2Me or CO2Et and R2 H; R1 H and R2 H or Ph react with one equivalent of PMe2Ph or PPh3 to give monosubstituted complexes with the phosphine ligand coordinated to the iron atom. When R1 CO2Me or CO2Et and R2 H, addition of two equivalents of PPh3 produces complexes with two PPh3 ligands coordinated to each metal. The complex [(CO)3FeCo(CO)3](μ-C(CO2Me)(CO2Me)H) also reacts with one equivalent of PMe2Ph, PMePh2, PPh3 or PPh2H to give monosubstituted complexes with the phosphine ligand bonded to the cobalt atom. The reaction of the complex [(CO)3FeCo(CO)3](μ-C(CO2Me)(CO2Me)H) with PPh3 gives a complex with the phosphine coordinated to the iron atom, but addition of two phosphines gives complexes with one phosphine ligand bonded to each metal. The structures of the products [(CO)3FeCo(CO)2(PMe2Ph)](μ-C(CO2Me)C(CO2Me)H) and [(CO)2(PMe2-Ph)FeCo(CO)2(PMe2Ph)]μ-C(CO2Me)(CO2Me)H) obtained from the reaction of the [(CO)3FeCo-(CO)3](μ-C(CO2Me)C(CO2 Me)H) complex with one and two equivalents of PMe2Ph, respectively, have been determined by X-ray crystallography. © 1992.
Original languageEnglish
Pages (from-to)65-82
JournalJournal of Organometallic Chemistry
Volume423
Issue number1
DOIs
Publication statusPublished - 14 Jan 1992

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