Preparation, properties, and reactivity of carbonylrhodium(I) complexes of di(2-pyrazolylaryl)amido-pincer ligands
作者:Sarath Wanniarachchi、Brendan J. Liddle、Sergey V. Lindeman、James R. Gardinier
DOI:10.1016/j.jorganchem.2011.08.013
日期:2011.11
six carbonylrhodium(I) complexes of three new and three previously reported di(2-3R-pyrazolyl)-p-Z/X-aryl)amido pincer ligands, (RZX)Rh(CO), (R is the substituent at the 3-pyrazolyl position proximal to the metal; Z and X are the aryl substituents para- to the arylamido nitrogen) were prepared. The metal complexes were studied to assess how their properties and reactivities can be tuned by varying
一系列六个羰基铑(I)配合物,分别是三个新的和三个先前报道的二(2-3R-吡唑基)-对-Z / X-芳基)酰胺钳式配体,(R ZX)Rh(CO),(R是替代在3-吡唑基位置邻近该金属; Z和X与芳基取代基对位-对芳基酰氨基氮)中制备。对金属络合物进行了研究,以评估如何通过改变沿配体周边的基团以及如何将其与其他已知的羰基铑(I)钳形衍生物进行比较来调节其性质和反应性。发现2-(吡唑基)-4-X-苯胺(X = Me或CF 3)与2-bromoaryl-1 H之间新的CuI催化的偶联反应促进了这项研究-吡唑,可以制造带有两个不同芳基臂的钳形配体。NNN钳式支架为羰基铑(I)片段提供了一个富电子的环境,如羰基拉伸频率在1948–1968 cm -1范围内所示。这样,在室温下的丙酮溶液中,与碘甲烷的氧化加成(OA)反应即刻进行,形成反式(NNN-钳子)Rh(Me)(CO)(I)。与碘乙烷的OA反应在