Spectroscopic studies-Cyclopentadienyl iron dicarbonyl ketone complexes

This dissertation is focused on the spectroscopic characterization of cyclopentadienyl iron
dicarbonyl ketone complexes 42. The ketone silver tetraflouroborate complexes 32 are
initially prepared. The formation of 32 is supported by the enhanced solubility of the
silver tetraflouroborate salt in the ketone dichloromethane solution and the infrared shifts
of the ketone carbonyl bands to lower wavenumbers. The ketone silver tetrafluoroborate
32 are reacted with cyclopentadienyl iron dicarbonyl iodide to produce cyclopentadienyl
iron dicarbonyl ketone complexes 42. These complexes (42) are characterised by infrared
(IR), proton and carbon- 13- nuclear magnetic resonance ('H/13CNMR) spectroscopies.
The infrared shifts of carbonyl bands to lower wavenumbers is observed in 42.
Carbon- 13 -nuclear magnetic resonance (13CNMR) of cyclopentadienyl iron dicarbonyl
cyclopentanone 42vi also compares very well with cyclopentadienyl iron dicarbonyl
complexes prepared by Ganson. The two terminal carbonyls of 42vi are less by A6 2.2 from
Gansons range of521 1.4 - 216.2. The two terminal carbonyls of 42vi appear at£209.2.
ass spectroscopy further shows cyclopentadienyl iron dicarbonyl ketone cation, i.e 49, as
a dorminant dissociation product.