Search Results

You are looking at 1 - 10 of 20 items for :

  • "Ruthenium complexes" x
  • Refine by Access: All Content x
Clear All
Journal of Thermal Analysis and Calorimetry
Authors: Valentina Uivarosi, Mihaela Badea, Rodica Olar, Dana Marinescu, Teodor Octavian Nicolescu, and George Mihai Nitulescu

of transindazoliumtetrachlorobis(indazole)ruthenate(III), a new anticancer ruthenium complex. IR, UV, NMR, HPLC investigations and antitumor activity. Crystal structures of trans-l-methylindazoliumtetrachlorobis-(1-methylindazole)ruthenate(III) and

Restricted access

Abstract

Structurally different chiral ruthenium complexes were used in the asymmetric hydrogenation of methyl acetoacetate to methyl (R)-3-hydroxybutanoate. The naphthalene and dioxazole biphosphine structure variations revealed a strong effect on the reaction rate and the parameter of enantioselectivity. The highest optical yields were achieved with catalysts bearing two metal centers and comprising the quaternary ammonium ionic character.

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Berta Holló, Milena Krstić, Sofija P. Sovilj, György Pokol, and Katalin Mészáros Szécsényi

Introduction The search for effective anticancer compounds based on metal centers has been developed in the last few decades of the twentieth century. Ruthenium complexes are potential alternative drugs to cisplatin, some of

Restricted access

Abstract  

In this work, hydrogenation of sorbic acid to cis-hex-3-enoic acid using homogeneous Ru catalyst [Cp*Ru(sorbic acid)]Tf (Tf = CF3SO3 ) immobilized to smectite materials by means of ion exchange has been studied. The immobilized catalyst was utilized for heterogeneous hydrogenation of sorbic acid to the desired cis-hex-3-enoic acid, achieving the selectivity of up to 95% and the possibility of the catalyst to be reused.

Restricted access

Abstract  

In contrast to the single molecule cage of Ru/acac/3 a cage involving wall molecules of RuCp2 is formed in recoil reaction of radioruthenium atoms. Enhancement of the parent yield in RuCp2 is ascribed to the larger size of the cage /effective hot reaction zone/ compared to the case of Ru/acac/3. A normalized appearance energy technique has been applied to estimate energy /AE adj x / necessary for caging the recoil atom in RuCp2. AE adj x is about twice as large as caging energy CE. The relation of AE adj x to CE in RuCp2 is nearly the same as that of AEx to bonding energy BE in Ru/acac/3.

Restricted access

Abstract  

A series of new complexes with mixed ligands of the type RuL2(DMSO)mCl3·nH2O ((1) L: norfloxacin (nf), m = 1, n = 1; (2) L: ciprofloxacin (cp), m = 2, n = 2; (3) L: ofloxacin (of), m = 1, n = 1; (4) L: enrofloxacin (enro), m = 0.5, n = 4; DMSO: dimethylsulfoxide) were synthesised and characterised by chemical analysis and IR data. In all complexes both fluoroquinolone derivative and DMSO act as unidentate. The thermal behaviour steps were investigated in synthetic air flow. The thermal transformations are complex processes according to TG and DTG curves including dehydration, quinolone derivative and DMSO degradation respectively. The final product of decomposition is ruthenium (IV) oxide.

Restricted access

and long-term stability. It is known in the literature [ 2 ] that, such great photovoltaic performance was achieved by using polypyridyl complexes of ruthenium and osmium. Several ruthenium complexes containing anchoring groups such as carboxylic acid

Restricted access

sustainable and environmentally friendly energy [ 11 – 13 ]. Several ruthenium complexes have been used as dyes for photovoltaic applications [ 1 – 8 ]. In these complexes, the anchoring groups such as carboxylic acid, dihydroxy, and phosphonic acid on

Restricted access

Journal 2012 , 18 , 14717 – 14724 . “ A fast-initiating ionically tagged ruthenium complex: a robust supported pre-catalyst for batch-process and continuous-flow olefin metathesis ” E. Borre , M. Rouen , I. Laurent , M

Restricted access

chlorine atoms (Cl(1)-Ru-Cl(2)-180°). The bond lengths of Ru–Cl and Ru–N were 2.408 and 2.082 Å in the complex. The Ru–Cl distance was comparable with the distance in other ruthenium complexes containing nitrogen heterocyclic ligands [ 25 , 26 ]. The bond

Restricted access