Mechanistic Features of the Oxidation–Reductive Coupling of Alcohols Catalyzed by Oxo-Vanadium Complexes
作者:Eric Steffensmeier、Matthew T. Swann、Kenneth M. Nicholas
DOI:10.1021/acs.inorgchem.8b02968
日期:2019.1.7
Ox–RC) produces carbonyl compounds and hydrocarbon dimers. A mechanistic study of this novel reaction is reported herein. Following our initial disclosure, new findings include the following: (1) The [(salimin)VO2]−-catalyzed Ox–RC of Ph2CHOH in the presence of fluorene affords the products of H-atom abstraction and all possible hydrocarbon dimers. (2) Electronic substituenteffects on the relative rates
氧合钒催化的活性醇氧化还原歧化反应(氧化还原偶合,Ox-RC)产生羰基化合物和烃二聚体。本文报道了对该新颖反应的机理研究。根据我们的初步披露,新发现包括以下内容:(1)在芴存在下[[salimin)VO 2 ] -催化的Ph 2 CHOH的Ox–RC提供了H原子抽象和所有可能的烃二聚体的产物。(2)电子取代基对Ox-RC相对于4-X-BnOH反应物和Bu 4 N [(Y-salimin)VO 2 ]催化剂的相对速率的影响(1a–c)揭示了(a)中X-BnOH反应物与自由基σ参数和(Y-salimin)VO的氧化速率(b)的相关性的氧化速率的相关2 -与标准哈米特σ参数。(3)1a–c电化学还原的难易程度为Y = NO 2 > OMe>H。(4)1与醇相互作用的环境1 H NMR研究表明,其弱缔合关系。(5)Ox-RC反应的密度泛函理论计算模型支持乒乓型催化途径,首先是通过(Salimin)VO
Electrochemical synthesis and structural characterization of nickel(II) and copper(II) complexes of tridentate schiff bases: Molecular structure of the five-coordinated copper(II) complex: 1,10-phenanthroline {2-[(2-oxyphenyl)iminomethyl]phenolato}copper(II)
作者:Elena Labisbal、Jose A. Garcia-Vazquez、Jaime Romero、Sofia Picos、Antonio Sousa、Alfonso Castiñeiras、Cäcilia Maichle-Mössmer
DOI:10.1016/0277-5387(94)00292-m
日期:1995.3
of metal anodes (copper and nickel) in acetonitrile solutions of Schiff bases (H2L) (synthesized from salicylaldehydes and 2-aminophenols) gave CuL and NiL complexes. When 1,10-phenanthroline (phen) or 2,2′-bipyridine (bipy) was added to the electrolytic cell, the mixedcomplexes CuLL′ and NiLL′ (L′ = phen or bipy) were obtained. The crystal structure of 1,10-phenanthroline 2-[(2-oxyphenyl)iminomet
The VO(IV) complexes of tridentate ONO Schiff ligands were synthesised and characterized by IR, UV–vis and elemental analysis. The electrochemical properties of the vanadylcomplexes were investigated by cyclic voltammetry. A good correlation was observed between the oxidation potentials and the electron withdrawing character of the substituents on the Schiffbase ligands, showing the following trend:
Coordination complexes of Mo(VI) with tridentate schiff base ligands: Synthesis and redox activity
作者:Joseph Topich
DOI:10.1016/s0020-1693(00)84132-8
日期:1980.1
SYNTHESIS, SPECTROSCOPIC, ANTIBACTERIAL AND ANTIOXIDANT ACTIVITIES OF Pd(II) COMPLEXES CONTAINING TRIDENTATE SCHIFF BASES
作者:Abidemi Demehin、Mary Oladipo、Banjo Semire
DOI:10.21608/ejchem.2019.12319.1766
日期:2019.6.27
Schiff bases were synthesized. These complexes were characterized by elemental analysis, infrared, ultraviolet-visible, proton and carbon-13 spectroscopies. The NMR spectra showed that the Schiff bases coordinated to the palladium(II) ion through the two deprotonated phenolic oxygen and azomethine nitrogen atoms. The presence of ammonia molecules in these complexes were indicated by the IR and 1H NMR