Hydrogen-atom and oxygen-atom transfer reactivities of iron(<scp>iv</scp>)-oxo complexes of quinoline-substituted pentadentate ligands
作者:Sandip Munshi、Arup Sinha、Solomon Yiga、Sridhar Banerjee、Reena Singh、Md. Kamal Hossain、Matti Haukka、Andrei Felipe Valiati、Ricardo Dagnoni Huelsmann、Edmar Martendal、Rosely Peralta、Fernando Xavier、Ola F. Wendt、Tapan K. Paine、Ebbe Nordlander
DOI:10.1039/d1dt03381f
日期:——
ated complex is in a mixed spin state. The steric bulk of the quinoline moieties forces the axial ligands to deviate from the Fe–Naxial axis. A higher deviation/tilt is noted for the high spin complexes, while the acetonitrile coordinated complex displays least deviation. This deviation from linearity is slightly less in the analogous low-spin iron(II) complex [FeII(L1-Qn)(NCMe)]2+ of the related asymmetric
一系列具有通式 [Fe II ( L2-Qn )(L)] n + ( n = 1, L = F - , Cl - ; n = 2, L = NCMe, H 2 O的铁( II )配合物) 已被分离和表征。X 射线晶体学数据表明,金属-配体键距随第六配体的不同配体场强而变化。以氟化物、氯化物和水为轴向配体的配合物是高自旋的,而乙腈配位的配合物则处于混合自旋状态。喹啉部分的空间体积迫使轴向配体偏离 Fe-N轴向轴。高自旋配合物的偏差/倾斜度较高,而乙腈配位配合物的偏差最小。由于仅存在一种空间要求高的喹啉,因此在相关不对称配体L1-Qn的类似低自旋铁 ( II ) 配合物 [Fe II ( L1-Qn )(NCMe)] 2+中,这种与线性的偏差略小部分。两种铁( II )-乙腈配合物[Fe II ( L2-Qn )(NCMe)] 2+和[Fe II ( L1-Qn )(NCMe)] 2+生成相应的铁(