Synthesis, structure, and physical properties for a series of trigonal bipyramidal MII–Cl complexes with intramolecular hydrogen bonds
作者:Nathaniel S. Sickerman、Young Jun Park、Gary K.-Y. Ng、Jefferson E. Bates、Mark Hilkert、Joseph W. Ziller、Filipp Furche、A. S. Borovik
DOI:10.1039/c2dt12244h
日期:——
tetradentate tripodal tris(2-amino-oxazoline)amine ligand (TAO) have been synthesized and characterized. X-Ray structural analyses of these compounds demonstrate the formation of the mononuclear complexes [MII(TAO)(Cl)]+, where MII = Cr, Mn, Fe, Co, Ni, Cu and Zn. These complexes exhibit distorted trigonal-bipyramidal geometry, coordinating the metal through an apical tertiary amine, three equatorial imino
合成并表征了一系列具有四齿三足三(2-氨基-恶唑啉)胺配体(TAO)的过渡金属氯络合物。这些化合物的 X 射线结构分析证明了单核配合物 [M II (TAO)(Cl)] +的形成,其中 M II = Cr、Mn、Fe、Co、Ni、Cu 和 Zn。这些配合物表现出扭曲的三角双锥几何形状,通过顶部叔胺、三个赤道亚氨基氮原子和轴向氯阴离子配位金属。所有配合物在金属结合氯离子占据的空腔内都具有分子内氢键(H-键合)网络。金属-氯化物键距非常长,这是由于氢键网络的影响。锌配合物的核磁共振(NMR)光谱表明,固态结构代表了在溶液中观察到的结构,并且氢键相互作用也持续存在。此外,还进行了密度泛函理论(DFT)计算来探测配合物的电子结构。
Utilizing tautomerization of 2-amino-oxazoline in hydrogen bonding tripodal ligands
作者:Young Jun Park、Nathaniel S. Sickerman、Joseph W. Ziller、A. S. Borovik
DOI:10.1039/c000160k
日期:——
A tetradentate tripodal ligand containing 2-amino-oxazoline moieties has been developed. This system tautomerizes upon chelation of a metal ion, forming a flexible cavity capable of accommodating ligands via an intramolecular hydrogen bonding network.