CARBON-13 MAGNETIC RESONANCE OF DIENE-IRON TRICARBONYL COMPLEXES.
NOYES CHEMICAL LAB UNIV OF ILLINOIS URBANA
Pagination or Media Count:
The C13 nmr spectra of butadiene-iron tricarbonyl and methyl octadecadienoate-iron tricarbonyl were obtained to elucidate the structure of these complexes. The C13-H coupling constants indicate that all of the C-H bonds in the butadiene complex are essentially sp2 hybrids. This observation, the C13 and proton chemical shifts, the H,H coupling constants and other data are consistent with a structure in which the bonding of Fe at C-2,3 in the diene complexes is very similar to that in ferrocene, but in which the terminal CH2 or CHR groups are rotated about the C1-C2 and C3-C4 bonds of the ligand. This steric distortion of the ligand from planarity makes the bonding of the Fe at C-1,4 differ somewhat from that at C-2,3, but both instances involve pi orbitals on the carbons. Author
- Inorganic Chemistry
- Organic Chemistry
- Atomic and Molecular Physics and Spectroscopy