Thesis - Open Access
Master of Science (MS)
Willian P. Jensen
The metal promoted hydration of Di-2-Pyridyl Ketone (DPK), has been of interest for some time in that it falls into a rare class of ligands that undergo reaction upon coordination to a transition metal ion. Metal promoted hydration here means that the carbonyl linkage of the ketone has undergone hydration to the diol form because the DPK is coordinated to a metal. Fig. 1 illustrates the hydration process. This is of interest because it is well known that ketones do not normally undergo hydration unless they are flanked by very strong electron withdrawing groups such as chloride or fluoride. Special mention must be made here about the role of the metal ion in that this hydration reaction should not be confused with a catalytic reaction. In this system, DPK becomes coordinated to the transition metal and remains in the complexed form throughout the hydration reaction of the ligand and remains attached thereafter. It has also been found that when DPK is coordinated to a metal ion in the hydrated form, it behaves in a tridentate fashion in that one of the oxygen atoms from the diol group forms a bond to the metal in the "axial" position. This third bond is very interesting in that the oxygen bonds in an unusual off axis position making an angle with the line normal to the equatorial plane (see Fig. 2). In 1:2 complexes of metal ion with DPK there is the possibility of pseudo-octahedral coordination about the metal ion. This study was undertaken in an attempt to gain additional insight into this intriguing system in hope that a better understanding of how this system works could be obtained.
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South Dakota State University
Sommerer, Shaun Owen, "The Metal Promoted Hydration of di-2-pyridyl Ketone and the Crystal and Molecular Structures of bis-2,2',N,N'-Bipyridyl Ketone-Hydrate Chromium(III) Chloride and Ruthenium(III) Chloride" (1987). Electronic Theses and Dissertations. 4476.