Synthesis and first X-ray structures of cobalt(II) and cobalt(III) complexes bearing 2,4-dioxo-alkanoic acid dialkylamide ligands
作者:Jian Wang、Nicholas A Morra、Hongda Zhao、Jeffrey ST Gorman、Vincent Lynch、Robert McDonald、John F Reichwein、Brian L Pagenkopf
DOI:10.1139/v08-151
日期:2009.1.1
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.Key
5-羟基戊烯有氧氧化为反式四氢呋喃 (THF),Mukaiyama 氧化,近年来已成为合成化学中的有力工具。在本报告中,我们描述了 Co(II) 和 Co(III) 盐的 2,4-二氧代-链烷酸二烷基酰胺配合物的第一个晶体结构。Co(II) 结构显示出前所未有的原子排列,中央 Co(II)(H2O)6 两侧是两个 Co(II) 原子,每个原子与三个阴离子螯合配体配位。二聚体 Co(III) 结构显示出两个阴离子螯合配体和桥接羟基。关键词:有氧氧化,反式四氢呋喃 (THF),钴,X 射线晶体学,氧化,配位。