Metal-ligand cooperativity in a ruthenium(II) complex of bis-azoaromatic ligand for catalytic dehydrogenation of alcohols

被引：6

作者：

Saha, Tanushri ^{[1
]}

Pramanick, Rajib ^{[1
]}

Sengupta, Debabrata ^{[1
]}

Goswami, Sreebrata ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Sch Chem Sci, Kolkata 700032, India

来源：

INORGANICA CHIMICA ACTA | 2019年 / 484卷

关键词：

TRANSFER HYDROGENATION; ELECTRONIC-STRUCTURES; OXIDATION; ACTIVATION; REDUCTION; MOLECULES; CHEMISTRY; EFFICIENT; ENERGIES; METHANOL;

D O I：

10.1016/j.ica.2018.09.038

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Herein a new Ru-phosphine complex (1) with molecular formula [RuL(PPh3)Cl-2] is reported where L is a redox active pincer ligand 2,6-bis(phenylazo)pyridine. The isolated complex has been characterized by usual spectroscopic techniques including single crystal X-ray crystallographic analysis. Complex 1 efficiently catalyzes aerobic oxidation of a wide range of primary and secondary benzylic, allylic, heterocyclic, alicyclic alcohols under mild conditions and is found to be superior over several other Ru (0, +2 and + 3), Ru-H and Ru-PPh3 catalysts. Mechanistic studies indicate that a transient Ru-H intermediate is formed in the catalytic cycle which gets switched into a Ru-hydrazo intermediate via hydrogen-walking mechanism. The catalyst is regenerated by aerial oxidation producing H2O2 as a by-product.

引用

页码：160 / 166

页数：7

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