An Azoaromatic Ligand as Four Electron Four Proton Reservoir: Catalytic Dehydrogenation of Alcohols by Its Zinc(II) Complex
作者:Rajib Pramanick、Rameswar Bhattacharjee、Debabrata Sengupta、Ayan Datta、Sreebrata Goswami
DOI:10.1021/acs.inorgchem.8b00034
日期:2018.6.18
Zn(II) serves as an oxophilic Lewis acid, while the ligand behaves as efficient storage of electron and proton. Synthesis, X-ray structure, and spectral characterizations of the catalyst, ZnLCl2 (1a) along with the two hydrogenated complexes of 1a, ZnH2LCl2 (1b), and ZnH4LCl2 (1c) are reported. It has been argued that the reversible azo-hydrazo redox couple of 1a controls aerobic dehydrogenation of alcohols
电质子存储材料尽管在能源相关研究中具有不可估量的价值,但在非天然化合物中却很少。在这里,我们报告了配体2,6-双(苯基偶氮)吡啶(L)的锌(II)配合物,在醇催化脱氢成醛/酮的过程中,它充当了多个电子和质子库。氧化还原惰性金属离子Zn(II)用作亲氧的路易斯酸,而配体的作用是有效存储电子和质子。催化剂ZnLCl 2(1a)以及1a,ZnH 2 LCl 2(1b)和ZnH 4 LCl 2(1a)的两种氢化络合物的合成,X射线结构和光谱表征报告1c)。有人认为1a的可逆偶氮-hydr氧化还原对可控制醇的好氧脱氢。氢化的络合物是高反应性的,并且将O 2和对-苯醌分别定量地还原为H 2 O 2和对-氢醌。基于受控实验,同位素标记和中间体的光谱分析,讨论了醇氧化的可能机理。