Carbon-13 nuclear magnetic resonance spectra of σ,η-binuclear complexes prepared from dodecacarbonyltri-iron and acetylenes
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 838-840
- https://doi.org/10.1039/dt9760000838
Abstract
The binuclear complexes [Fe2(CR1:CR2·CR3:CR4)(CO)6], (I), and [Fe2(µ-CR1:CR2·CO·CR3:CR4)(CO)6], (II), have been investigated by 13C n.m.r. spectroscopy (R1, R2, R3, R4= H, Me, But, Ph, or CH2:CH·CH:CH2). Low-field absorptions observed for carbon atoms σ- and η-bonded to two iron atoms are discussed for the two classes of complex. Variable-temperature 13C n.m.r. spectra show that these complexes are stereochemically non-rigid; steric effects are important in the fluxional behaviour of the Fe(CO)3 moiety in complexes (II).Keywords
This publication has 0 references indexed in Scilit: