Synthesis and first X-ray structures of cobalt(II) and cobalt(III) complexes bearing 2,4-dioxo-alkanoic acid dialkylamide ligands

Jian Wang; Morra, Nicholas A.; Hongda Zhao; Gorman, Jeffrey S. T.; Lynch, Vincent; McDonald, Robert; Reichwein, John F.; Pagenkopf, Brian L.
January 2009
Canadian Journal of Chemistry;Jan2009, Vol. 87 Issue 1, p328
Academic Journal
The aerobic oxidation of 5-hydroxy pentenes to trans-tetrahydrofurans (THFs), the Mukaiyama oxidation, has in recent years emerged as a powerful tool in synthetic chemistry. In this report we describe the first crystal structures of 2,4-dioxo-alkanoic acid dialkylamide complexes for both Co(II) and Co(III) salts. The Co(II) structures show an unprecedented arrangement of atoms, with a central Co(II)(H2O)6 flanked by two Co(II) atoms each coordinated with three anionic chelating ligands. The dimeric Co(III) structures show two anionic chelating ligands and bridging hydroxyl groups.


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