(Benzylideneacetone)iron tricarbonyl
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The organometallic compound (benzylideneacetone)Fe(CO)3 (CAS # = [38333-35-6], mp 88–89 °C) is a widely employed reagent for transferring the Fe(CO)3 unit to other organic molecules.[1] This red-colored compound is commonly abbreviated (bda)Fe(CO)3. It is prepared by the reaction of Fe2(CO)9 with benzylideneacetone, typically in refluxing diethyl ether.[2] The compound identity and purity can be by its IR spectrum: it absorbs strongly at 2065, 2005, 1985 cm-1 (cyclohexane solution).
[edit] Related Fe(CO)3 transfer agents
A popular source of Fe(CO)3 is the simplest, Fe2(CO)9. Alternatively, Fe(CO)3(cyclooctene)2 is highly reactive, the trade-off being that it is thermally sensitive. Imine derivatives of cinnamaldehyde, e.g. C6H5CH=CHC(H)=NC6H5, form conveniently reactive Fe(CO)3 adducts, which have been shown to be superior in some ways to (bda)Fe(CO)3.[3]
(bda)Fe(CO)3 reacts with Lewis bases to give adducts without displacement of the bda.[4]
[edit] References
- ^ Knölker, H.-J. "(η4-Benzylideneacetone)tricarbonyliron" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. DOI: 10.1002/047084289.
- ^ Alcock, N. W.; Richards, C. J.; Thomas, S. E. ”Preparation of Tricarbonyl(η4-vinylketene)iron(0) Complexes from Tricarbonyl(η4-vinyl ketone)iron(0) Complexes and Their Subsequent Conversion to Tricarbonyl(η4-vinylketenimine)iron(0) Complexes” Organometallics 1991, volume 10, pp 231 - 238.DOI: 10.1021/om00047a054.
- ^ Knölker, H.-J.; Braier, A.; Bröcher, D. J.; Cämmerer, S. Fröhner, W.; Gonser, P.; Hermann, H.; Herzberg, D.; Reddy, K. R.; Rohde, G. “Recent applications of tricarbonyliron-diene complexes to organic synthesis” Pure and Applied Chemistry 2001, Volume 73, pp. 1075–1086.
- ^ Howell, J. A. S.; Kola, J. C.; Dixon, D. T.; Burkinshaw, P. M. and Thomas, M. J., "The kinetics and mechanism of diene exchange in (É≈4-enone) Fe(CO)2L complexes (L = phosphine, phosphite)", Journal of Organometallic Chemistry, 1984, 266, 83-96
