The structures of some derivatives of dicarbonylcyclopentadienyliron dimer [{Fe(π-C5H5)(CO)2}2] obtained from the reaction of pentacarbonyliron with fulvenes
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2119-2123
- https://doi.org/10.1039/j19700002119
Abstract
Pentacarbonyliron and fulvenes, C5H4CR1R2(R1,R2= Me, Et, or Ph) react in diglyme under reflux to give [{Fe(π-R1R2CH·C5H4)(CO)2}2] these compounds exist as their trans-bridged isomers in the solid state, but primarily as a mixture of these with their cis-counterparts in solution. The relative proportions of these species depends upon the solvent, and upon R1 and R2. The complex obtained from 6-dimethylaminofulvene is a ‘linked’ dimer, [Fe2(π-C5H4·CHNMe2·CHNMe2·C5H4)(CO)4] with a cis-conformation. Its i.r. spectrum is independent of solvent and shows that although [{Fe(π-C5H5)(CO)2}2] does not exist solely as its cis-isomer in, for example, heptane solution, this is the principal tautomer present in acetonitrile and related solvents.Keywords
This publication has 0 references indexed in Scilit: