Synthesis and Oxidative Stability of an Anionic Perfluoroethyl Cobalt(III) Complex |
| |
| Authors: | Scott T Shreiber David A Vicic |
| |
| Institution: | Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA, 18015 USA |
| |
| Abstract: | Upon reaction of the versatile tris(perfluoroethyl) cobalt(III) precursor fac-(MeCN)3Co(C2F5)3] with potassium tris(pyrazolyl)borate (KTp) in the presence of a tetraphenylphosphonium salt, κ2- and κ3- adducts of the scorpionate ligand with cobalt were observed. Heating this mixture to 50 °C induced complete κ3-coordination of the Tp ligand to cobalt to afford the anionic complex PPh4](κ3-Tp)Co(C2F5)3] in 81 % yield. This new fluoroalkyl cobalt complex was characterized by NMR and UV-Vis spectroscopies, X-ray crystallography, and cyclic voltammetry. The oxidation of PPh4](κ3-Tp)Co(C2F5)3] occurs at much less-positive potentials relative to the related (MeCN)3Co(C2F5)3] and (tpy)Co(C2F5)3] derivatives. |
| |
| Keywords: | cobalt fluorine fluoroalkylation X-ray crystallography electrochemistry |
|
|
