Synthesis and molecular structure of ruthenium(III) benzoylhydrazone complexes: Substituents effect on transfer hydrogenation of ketones
作者:Appukutti Kanchanadevi、Rengan Ramesh、Nattamai Bhuvanesh
DOI:10.1016/j.jorganchem.2015.04.032
日期:2015.7
in these complexes. Further, the complexes 1–5 have been proven to catalyse the transfer hydrogenation of linear, cyclic and aromatic ketones to their corresponding secondary alcohols in the presence of i-PrOH/KOH at 82 °C and the maximum conversion is up to 99%. The effect of other variables on the transfer hydrogenation reaction such as solvent, base, temperature, time and catalyst loading is also
已经报道了容易且方便地合成具有通式[Ru(L)Cl(PPh 3)2 ]的苯甲酰hydr(其中L = 2-羟基-1-萘醛苯甲酰hydr)的一系列新的八面体钌(III)配合物。所有配合物的组成均已通过微分析,红外,电子,磁性和EPR光谱技术明确表征。取代的苯甲酰hydr配体表现为双阴离子三齿O,N和O供体,并通过酚氧,偶氮甲碱氮和去质子化的酰胺氧。该络合物在可见光区域显示出适度强的配体-金属电荷转移跃迁,在UV区域显示出配体内跃迁。配合物的磁矩(298 K)在1.72–1.97μB的范围内,表明在金属中心存在一个不成对的电子。低自旋单核Ru(III)苯甲酰hydr配合物在冷冻溶液中显示菱形EPR光谱图。两种配合物的分子结构已通过单晶X射线晶体学确定,表明这些配合物中存在八面体几何形状失真。此外,复合物1 - 5业已证明,在i -PrOH / KOH存在下,在82°C的条件下,催化线性,环状和芳