Phosphaferrocenes as phosphorus ligands. Crystal and molecular structure of tetracarbonyl(3,4-dimethylphosphaferrocene-P)iron
- 1 January 1980
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 12,p. 2522-2525
- https://doi.org/10.1039/dt9800002522
Abstract
The structure of the title compound shows that the phospholyl ring remains fully aromatic even after phosphorus(P-) complexation of phosphaferrocene: the three C–C bond lengths are almost equal with a mean value of 1.411(3)Å and the P–C bonds are very short: 1.739(3)Å. The Fe ⋯ C4P and Fe ⋯ C5H5 distances increase upon P-complexation and the configuration of the sandwich is staggered whereas it was eclipsed in free phosphaferrocene. The geometry of the P → Fe (CO)4 moiety is a classical trigonal bipyramid with apical phosphorus. The P–Fe distance is short, 2.211 (1)Å, indicating that the bond is strong and that phosphaferrocene is a strong ligand even though it is a weak donor on the basis of the i.r. data.Keywords
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