Epoxidation and catalytic oxidation of olefins based on a RuIV:O/RuII-OH2 couple

Dobson, J. C.; Seok, Won; Meyer, Thomas J.

doi:10.1021/ic00230a001

Cited by 80 publications

(41 citation statements)

References 2 publications

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“…The study of catalysts and advanced materials has spurred this interest. A short list of examples include Y in superconductors [l], Mo [2]-and Ru [3]-based oxidation catalysts, Tc radiopharmaceuticals [4], Zr organometallics' [5], Rh hydroformylation catalysts [6], adsorption of molecular hydrogen by Pd [7], and silver oxide catalysts for the epoxidation of olefins [8]. As with any area of chemistry, it is of interest to carry out theoretical investigations to elucidate the pertinent electronic structural factors.…”

Section: Introductionmentioning

confidence: 99%

An intermediate neglect of differential overlap model for second‐row transition metal species

Anderson

Cundari

Zerner

1991

Int J of Quantum Chemistry

145

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An intermediate neglect of differential overlap (INDO) model for elements of the second transition series is described. Values of exponents for the radial portion of the Slater basis atomic orbitals, the orbital ionization energies, and the beta (or bonding) parameters for these elements are reported. Use of the model to investigate equilibrium geometries, relative energy ordering of geometric isomers, spectroscopic transition energies, energy ordering of state wave functions of different symmetry, trends in dipole moments, and equilibrium stretching frequencies is reported. The results indicate that the INDO method is capable of yielding quality results for species containing atoms of the second transition series.

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Section: Introductionmentioning

confidence: 99%

An intermediate neglect of differential overlap model for second‐row transition metal species

Anderson

Cundari

Zerner

1991

Int J of Quantum Chemistry

145

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“…Os espectros de ultravioleta no visível em CH2Cl2 e em solução aquosa, pH 8,1 (figuras 5 e 6, respectivamente), apresentam uma única banda de absorção bem definida. De acordo com a literatura (Takeuchi et al, 1984;Dobson et al, 1986;Seok & Meyer, 1988) 2+ (referentes aos sistemas Ru IV/III e Ru III/II ). De fato, a voltametria cíclica em meio aquoso, pH 8,1 (figura 8, tabela 2) indicou apenas a presença de dois pares de ondas redox (0,34 e 0,77 V), enquanto o voltamograma em meio orgânico (CH2Cl2) revela a presença de três pares de ondas redox (0,90, 1,27 e 1,44 V), sendo os dois últimos pares de ondas mais evidentes (figura 7, tabela 2).…”

Section: ♦ ♦ ♦ ♦ Espectroscopia No Visívelunclassified

Synthesis and Characterization of a New Ruthenium (Ii) Diarsinic Aquacomplex

Batalini¹,

Giovani²

2019

PTQ

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Ruthenium complexes are used as catalysts, energy converters, some have biological activity, among other applications. The ruthenium chemistry reserves remarkable stability when complexed with organic ligands, mainly bipyridine and tripyridine. Ruthenium polypyridine aquacomplexes have acted as excellent electrocatalysts in the conversion of organic substances, since they offer interesting patterns of binding with ruthenium. The preparation of ruthenium aquacomplexes combining tripyridine and bidentate arsine ligands is not officially described. Good advantages have been found when using ligands containing mixed mono, di or tripyridines with bidentate ligands in their coordination sphere, such as the verified stability of these complexes, without loss of ligands during the process and the possibility of better stereochemical control during the synthesis of these complexes. This work stands out the synthesis, in three stages, of a new ruthenium tripyridine complex containing a bidentate arsine: [Ru(L)(totpy)(OH2)](ClO4)2 (L=Ph2AsCH2CH2AsPh2); (totpy=4'-(4-tolyl)-2,2':6',2''-terpyridine). Each step of the synthetic route showed a significant reaction yield and the voltammetric, spectroscopic and microanalytical characterization results point positively to the proposed chemical structure of the complex.

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“…Complexation of ruthenium with 2,2'-bipyridine and pyridine provides a cation, [(bpY)2pyRu(O)]2+, that functions as a PTC catalyst with aqueous sodium hypochlorite to oxidize styrene and cis-and trans-stilbenes to benzaldehyde (70--99%) as the major product and epoxides (0--22%) as minor products [123]. When ruthenium is added as a cocatalyst in the PTC oxidation of phenanthrene with hypochlorite, further oxidation occurs (compared to phenanthrene epoxide produced in the absence of ruthenium) to yield 2,2' -biphenyldicarboxylic acid in 85% yield [124].…”

Section: Ruthenium Catalystsmentioning

confidence: 99%