The Determination of Ruthenium by Atomic Absorption Spectrophotometry

Rowston, W. B.; Ottaway, J. M.

doi:10.1080/00032717008067803

Cited by 22 publications

(4 citation statements)

References 3 publications

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“…The elemental analyses were carried out at the Instituto de Química da Universidade de São Paulo. The ruthenium analyses were performed according to the method of Rowston and Ottaway, modified by Clarke, using a polarized Zeeman atomic absorption spectrophotometer, Hitachi model Z-8100.…”

Section: Methodsmentioning

confidence: 99%

Detection of the EPR Spectra of NO^• in Ruthenium(II) Complexes

McGarvey

Ferro²,

Tfouni³

et al. 2000

Inorg. Chem.

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The EPR of NO. can be detected in the liquid and solid states when crystal fields are sufficient to remove the axial symmetry and separate the (pi*)x and (pi*)y orbitals by a few hundred reciprocal centimeters. The theory of the EPR spin Hamiltonian of bound NO. is reviewed, further developed, and then applied to the observed frozen-liquid spectra of NO. bound to Ru(II) obtained from RuIINO+ complexes by reduction. Comparisons to earlier reports on the observation of the EPR spectra of NO. are made.

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Section: Methodsmentioning

confidence: 99%

Detection of the EPR Spectra of NO^• in Ruthenium(II) Complexes

McGarvey

Ferro²,

Tfouni³

et al. 2000

Inorg. Chem.

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“…The elemental analyses were carried out at the Instituto de Quı ´mica da Universidade de Sa ˜o Paulo. The ruthenium analysis was performed according to the method of Rowston and Ottaway, 15 modified by Clarke, 16 using a Polarized Zeeman atomic absorption spectrophotometer, Hitachi (model Z-8100).…”

Section: Methodsmentioning

confidence: 99%

Water π-Donation in trans-Tetraammineruthenium(II): Effect on Coordinated-Water Properties Induced by a Trans NO Ligand

et al. 1999

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The complex trans-[Ru(NH 3 ) 4 NO(H 2 O)]Cl 3 ‚H 2 O has been isolated as a decomposition product of the dimeric cation [{Ru(NH 3 ) 4 NO} 2 (µ-S 2 )] 6+ . The elemental analysis and electronic, infrared, X-ray, and ESR spectroscopies fit well with the formulation trans-[Ru(NH 3 ) 4 NO(H 2 O)]Cl 3 ‚H 2 O. The ν NO (1912 cm -1 ) observed and the ∠(Ru-N-O) ) 178.1°(5) are consistent with the nitrosonium character of the NO ligand. Cyclic voltammetry showed only one redox process in the range -0.5 to +1.2 V, which was attributed to the reactionThe pK a values 3.1 ( 0.1 and 7.7 ( 0.1 (µ ) 0.10 M, NaCl) have been measured for the reaction trans-[Ru(NH 3 ) 4 L(H 2 O)] n+ + H 2 O T trans-[Ru-(NH 3 ) 4 L(OH)] (n-1)+ + H 3 O + , where L ) NO + and CO, respectively. The substitution of the coordinated water molecule in trans-[Ru(NH 3 ) 4 (H 2 O)NO] 3+ by chloride ions proceeds about 30-fold times slower than in [Ru-(NH 3 ) 5 (H 2 O)] 3+ (k Cl _ ) 8.7 × 10 -5 M -1 s -1 and 3.7 × 10 -6 M -1 s -1 , respectively; 40°C, µ ) 2.0 NaCl, [H + ]) 1.0 × 10 -2 mol L -1 ). Quantum mechanical DFT calculations show that the mixing between the lone pair of the oxygen, π in character, and the d xz orbital of the metal is linearly related to the pK a of the water ligand and to the water lability. The calculations have also shown that the π-d mixing is strongly dependent on the trans ligand L. The electronic spectra of the trans-[Ru(NH 3 ) 4 (H 2 O)L] n+ (L ) CO and NO + ) species are discussed on the basis of DFT and ZINDO/S calculations.

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“…The complexes were characterized spectrophotometrically by comparison of the λ max and ε max values with literature values. ,− If those values were not known, the complexes were identified by atomic absorption analysis of the ruthenium content and elemental analysis of the carbon, hydrogen, and nitrogen contents. The atomic absorption analysis of ruthenium was carried out according to Rowston's method by means of a Jarrell-Ash AA-855 spectrophotometer. 18-Crown-6 ether was purified from acetonitrile and stored under nitrogen before use as mentioned previously …”

Section: Methodsmentioning

confidence: 99%

Effect of Second-Sphere Coordination. 4.¹Factors Influencing the Electrochemical Behavior of Ruthenium−Ammine Complexes Caused by Second-Sphere Coordination of Crown Ethers

et al. 1996

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Second-sphere coordination was investigated spectrophotometrically and electrochemically with various ruthenium−ammine complexes with crown ethers in acetonitrile solution. Spectrophotometric results revealed that the acidity of the ammine ligands of the complex, which depends on the valence of the metal center, predominantly affects the second-sphere coordination of the crown ether to the ruthenium−ammine complexes. This fact explains the difference in the stoichiometry between the adducts of ruthenium(II) and ruthenium(III) complexes with 18-crown-6 ether. It was found that the number of ammine ligands, the π-electron acceptability of ancillary ligands of the complex, and the flexibility of the crown ether ring affected the change in the redox potential of the complexes caused by second-sphere coordination of crown ethers.

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The Determination of Ruthenium by Atomic Absorption Spectrophotometry

Cited by 22 publications

References 3 publications

Detection of the EPR Spectra of NO^• in Ruthenium(II) Complexes

Detection of the EPR Spectra of NO^• in Ruthenium(II) Complexes

Water π-Donation in trans-Tetraammineruthenium(II): Effect on Coordinated-Water Properties Induced by a Trans NO Ligand

Effect of Second-Sphere Coordination. 4.¹Factors Influencing the Electrochemical Behavior of Ruthenium−Ammine Complexes Caused by Second-Sphere Coordination of Crown Ethers

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The Determination of Ruthenium by Atomic Absorption Spectrophotometry

Cited by 22 publications

References 3 publications

Detection of the EPR Spectra of NO• in Ruthenium(II) Complexes

Detection of the EPR Spectra of NO• in Ruthenium(II) Complexes

Water π-Donation in trans-Tetraammineruthenium(II): Effect on Coordinated-Water Properties Induced by a Trans NO Ligand

Effect of Second-Sphere Coordination. 4.1Factors Influencing the Electrochemical Behavior of Ruthenium−Ammine Complexes Caused by Second-Sphere Coordination of Crown Ethers

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Detection of the EPR Spectra of NO^• in Ruthenium(II) Complexes

Detection of the EPR Spectra of NO^• in Ruthenium(II) Complexes

Effect of Second-Sphere Coordination. 4.¹Factors Influencing the Electrochemical Behavior of Ruthenium−Ammine Complexes Caused by Second-Sphere Coordination of Crown Ethers