Event Website
http://www.bates.edu/mt-david-summit.xml
Start Date
1-4-2011 1:45 PM
End Date
1-4-2011 3:00 PM
Description
Six-Coordinate Cobalt(III) complexes have been synthesized through a series of substitution reactions. [Co(III) en2Cl2]1+(Cl-) has been reacted with sulfur containing amines (giving a total of one sulfur and five amine interactions). The formation of these compounds was done either through one reaction (direct application of amine to cobalt complex), or through two (direct application, followed by a second heated reaction to cause the sulfur bond to form). These complexes were confirmed to be the expected compounds by 1H- and 13C-NMR. The cobalt-sulfur metal-ligand interaction gives a strong peak at a specific wavelength (~300 nm) in the ultraviolet range, and this peak was used to quantify the strength of the interaction. Kinetic studies were done to this effect using small amounts of NaOH to disrupt the sulfur-cobalt interaction and replace it with a water-cobalt interaction.
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Synthesis and Kinetic Studies of Six-Coordinate Cobalt(III) Complexes Containing Sulfur- and Nitrogen-based Organic Ligands
Six-Coordinate Cobalt(III) complexes have been synthesized through a series of substitution reactions. [Co(III) en2Cl2]1+(Cl-) has been reacted with sulfur containing amines (giving a total of one sulfur and five amine interactions). The formation of these compounds was done either through one reaction (direct application of amine to cobalt complex), or through two (direct application, followed by a second heated reaction to cause the sulfur bond to form). These complexes were confirmed to be the expected compounds by 1H- and 13C-NMR. The cobalt-sulfur metal-ligand interaction gives a strong peak at a specific wavelength (~300 nm) in the ultraviolet range, and this peak was used to quantify the strength of the interaction. Kinetic studies were done to this effect using small amounts of NaOH to disrupt the sulfur-cobalt interaction and replace it with a water-cobalt interaction.
http://scarab.bates.edu/mt_david_summit/MDS2011/02Poster/19