Organometallic complexes containing phosphorus(V) bonded to a transition metal: derivatives of dicarbonyl(η-cyclopentadienyl)ferrate(1–)
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 7,p. 610-613
- https://doi.org/10.1039/dt9760000610
Abstract
The complexes [Fe(η-C5H5)(CO)2(PR2E)][E = S, R = Me (I); E = S, R = OEt (II); E = Se, R = Ph(III)] have been synthesized by the reaction of Na[Fe(η-C5H5)(CO)2] with PBrMe2S, PCl(OEt)2S, or PPh2ClSe. The method seems to be valid for the preparation of a variety of the title complexes and suitable for a wider series of carbonylmetallate anions. On the basis of i.r. and 1H n.m.r. data, the complexes are believed to contain an Fe–P rather than Fe–E bond. On treating tertiary phosphines, L (PPh3 or PMe2Ph), with the complexes (I)–(III), no evidence has been obtained for formation of phosphido-complexes and only substitution products of carbon monoxide have been obtained; using MeI or [OMe3][BF4] as reagents, the cations [Fe(η-C5H5)(CO)2{PR2(EMe)}]+ are obtained by S- or Se-methylation; Etl and [OEt3][BF4] react only with complex (I). The structure of the cationic complexes has been established by i.r. and 1H n.m.r. Spectroscopy.Keywords
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