The reaction between [Fe(η5-C5H5)(CO)2Cl] and {(S)-Prolophos}, a chiral chelating ligand without a C2 axis, yields [Fe(η5-C5H5){(S)-Prolophos}(CO)]Cl spontaneously and quantitatively; the chelation of the ligand forms a pair of diastereoisomers differing only in the iron configuration. Reprecipitation with NH4PF6 leads to [Fe(η5-C5H5){(S)-Prolophos}(CO)]PF6 with 83% diastereoisomeric excess (d.e. %) at the iron chiral centre. One recrystallization is sufficient to give the optically pure iron complex whose absolute configuration has been tentatively assigned as S. [Fe(η5-C5H5){(S)-Prolophos}(CO)]PF6 on UV irradiation in THF splits off the CO ligand to give the highly reactive complex [Fe(η5-C5H5){(S)-Prolophos}(THF)]PF6; the iron(tetrahydrofuran) complex regenerates the title compound with an overall retention of configuration upon treatment with carbon monoxide.

Optically active transition metal compounds, chiral at the metal center. Synthesis and stereochemical studies of the chiral cyclopentadienyl iron complexes [Fe(h5-C5H5){(S)-Prolophos}(CO)PF6 / E.Cesarotti, L. Prati, M. Grassi. - In: POLYHEDRON. - ISSN 0277-5387. - 1990:5(1990), pp. 639-644. [10.1016/S0277-5387(00)80269-7]

Optically active transition metal compounds, chiral at the metal center. Synthesis and stereochemical studies of the chiral cyclopentadienyl iron complexes [Fe(h5-C5H5){(S)-Prolophos}(CO)PF6

E. Cesarotti;L. Prati;
1990

Abstract

The reaction between [Fe(η5-C5H5)(CO)2Cl] and {(S)-Prolophos}, a chiral chelating ligand without a C2 axis, yields [Fe(η5-C5H5){(S)-Prolophos}(CO)]Cl spontaneously and quantitatively; the chelation of the ligand forms a pair of diastereoisomers differing only in the iron configuration. Reprecipitation with NH4PF6 leads to [Fe(η5-C5H5){(S)-Prolophos}(CO)]PF6 with 83% diastereoisomeric excess (d.e. %) at the iron chiral centre. One recrystallization is sufficient to give the optically pure iron complex whose absolute configuration has been tentatively assigned as S. [Fe(η5-C5H5){(S)-Prolophos}(CO)]PF6 on UV irradiation in THF splits off the CO ligand to give the highly reactive complex [Fe(η5-C5H5){(S)-Prolophos}(THF)]PF6; the iron(tetrahydrofuran) complex regenerates the title compound with an overall retention of configuration upon treatment with carbon monoxide.
Settore CHIM/03 - Chimica Generale e Inorganica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/186053
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