trans- and cis-Ru(II) aminophosphine complexes: Syntheses, X-ray structures and catalytic activity in transfer hydrogenation of acetophenone derivatives

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Section: Resultsmentioning

confidence: 99%

A modular design of metal catalysts for the transfer hydrogenation of aromatic ketones

Aydemir

Baysal

Gümgüm

2012

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“…The synthesis of ruthenium complexes and their catalytic applications belong to the most important topics of study in academic science and industry . There are multiple catalytic applications in this field .…”

Section: Introductionmentioning

confidence: 99%

New iminophosphine–Ru(II) complexes and their application in hydrogenation and transfer hydrogenation

Keleş

Sahinoglu

Emir

et al. 2014

Ruthenium complexes [RuCl2L2] were prepared by treating [RuCl2(p‐cymene)]2 with structurally similar N‐(2‐(diphenylphosphino)benzylidene)‐3‐methylpyridin‐2‐amine, 4‐(2‐(diphenylphosphino)benzylideneamino)‐3‐methylphenol and 4‐(2‐(2‐(diphenylphosphino)benzylideneamino)ethyl)phenol refluxed in toluene. These complexes were used as catalysts for the transfer hydrogenation of acetophenones in 2‐propanol and for the direct hydrogenation of styrenes under hydrogen pressure. The results of the catalytic studies provide evidence that these complexes function as excellent catalysts for hydrogenation and transfer hydrogenation. Copyright © 2014 John Wiley & Sons, Ltd.

“…The complex with sp 3 ‐hybribized nitrogen containing N―H bonds displays a higher reaction rate. On the other hand, the presence of an N―H group in the ligands makes it possible to stabilize a six‐membered cyclic transition state by forming a hydrogen bond with the oxygen atom of ketones . Therefore, these kinds of ligands are attractive and also widely used, especially in ruthenium, rhodium and iridium complexes, for catalytic transfer hydrogenation reactions …”

Section: Resultsmentioning

confidence: 99%

Rhodium‐catalyzed transfer hydrogenation with aminophosphines and analysis of electrical characteristics of rhodium(I) complex/n‐Si heterojunctions

Aydemir

Ocak

Rafikova

et al. 2014

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A series of novel neutral mononuclear rhodium(I) complexes of the P-NH ligands have been prepared starting from [Rh(cod) Cl] 2 complex. Structural elucidation of the complexes was carried out by elemental analysis, IR and multinuclear NMR spectroscopic data. The complexes were applied to the transfer hydrogenation of acetophenone derivatives to 1-phenylethanol derivatives in the presence of 2-propanol as the hydrogen source. Catalytic studies showed that all complexes are also excellent catalyst precursors for transfer hydrogenation of aryl alkyl ketones in 0.1 M iso-PrOH solution. In particular, [Rh(cod)(PPh 2 NH-C 6 H 4 -4-CH(CH 3 ) 2 )Cl] acts as an excellent catalyst, giving the corresponding alcohols in excellent conversion up to 99% (turnover frequency ≤ 588 h À1 ). Furthermore, rhodium(I) complexes have been used in the formation of organic-inorganic heterojunction by forming their thin films on n-Si and evaporating Au on the films. It has been seen that the structures have rectifying properties. Their electrical properties have been analyzed with the help of currentvoltage measurements. Finally, it has been shown that the complexes can be used in the fabrication of temperature and light sensors.