The Dithiolate-Bridged Diiron Hexacarbonyl Complex
Na<sub>2</sub>[(μ-SCH<sub>2</sub>CH<sub>2</sub>COO)Fe(CO)<sub>3</sub>]<sub>2</sub> as a Water-Soluble PhotoCORM
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Abstract
The water-soluble dimercaptopropanoate-bridged
diiron hexacarbonyl
complex Na<sub>2</sub>[(μ-SCH<sub>2</sub>CH<sub>2</sub>COO)Fe(CO)<sub>3</sub>]<sub>2</sub> has been prepared, and the X-ray crystal structure
and infrared, UV–visible, and ESI spectra of the complex have
been obtained. The complex is shown to behave as a photoCORM, whereby
all six CO ligands are released within 30 min of visible-light irradiation.
Gas-phase FTIR spectroscopy has been used to quantify the release
of CO into the headspace above the aqueous solution. The resulting
product, tentatively assigned to an iron thiolate salt, is also water-soluble.
Cell viability studies show that Na<sub>2</sub>[(μ-SCH<sub>2</sub>CH<sub>2</sub>COO)Fe(CO)<sub>3</sub>]<sub>2</sub> is not cytotoxic
toward normal epithelial cells
