Issue 22, 1992

Reactivity of iron(II) non-classical hydrides with alkynes

Abstract

The complex [FeH(η2-H2){PPh(OEt)2}4]BPh4 reacts with terminal alkynes HC[triple bond, length half m-dash]CR (R =p-tolyl, But or SiMe3) to give the corresponding alkenes H2C[double bond, length half m-dash]CHR and the butenynyl derivative [Fe(η3-RC3CHR){PPh(OEt)2}4]+. In contrast, the related complex [FeH(η2-H2){P(OEt)3}4]BPh4 reacts with terminal alkynes to yield alkenes and σ-acetylide [Fe(C[triple bond, length half m-dash]CR){P(OEt)3}5]+ derivativs. Activated alkynes such as HC[triple bond, length half m-dash]CCO2Me and MeO2CC[triple bond, length half m-dash]CCO2Me react with both [FeH(η2-H2)L4]BPh4[L = P(OEt)3 or PPh(OEt)2] to give vinyl derivatives [Fe{CH[double bond, length half m-dash]CH(CO2Me)}L4]+ and [Fe{C(CO2Me)[double bond, length half m-dash]CH(CO2Me)}L4]+, respectively. The characterization of the complexes by IR, 1H, 13C and 31P NMR spectroscopy is discussed.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1992, 3203-3208

Reactivity of iron(II) non-classical hydrides with alkynes

G. Albertin, S. Antoniutti, E. Del Ministro and E. Bordignon, J. Chem. Soc., Dalton Trans., 1992, 3203 DOI: 10.1039/DT9920003203

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