Annealing Behaviour of Some Salts of Trisethylenediamine Cobalt III

Dimotakis, P. N.; Maddock, A. G.; Vassos, Basil H.

doi:10.1524/ract.1967.8.1.38

Cited by 10 publications

(7 citation statements)

References 11 publications

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“…SAITO [4] used the radioactive bromine produced by the (η, γ) reaction on [Co(NH 3 ) 6 X]Br a to study the effect of the nature of ligand X on retention. The effect of anion Y on the retention of cobalt in complexes of the type [Co(NH 3 ) 5 X] Y 2 and other cobalt ammine complexes has also been investigated [5,6], Research has been carried out using optical and geometric isomers of cobalt complexes [7,8,9] to determine the interconversion caused by irradiation but results vary for different complexes.…”

Section: Introductionmentioning

confidence: 99%

“…Several species are again formed but few have been identified with any degree of certainty. SCHMIDT [15] has investigated the (η, γ) reaction in [Ir(NH 3 ) 5 Cl] Cl 2 and [Rh(NH 3 ) 8 Br] (N0 3 ) 2 ; with the iridium complex, six cationic species and one neutral species of iridium were found by electrophoresis but only the one corresponding to the parent compound was characterised. The rhodium complex showed only 5% retention.…”

Section: Introductionmentioning

confidence: 99%

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Chemical Effects of the (n, γ) Reaction in Chloropentaammine Complexes of Cobalt (IIΙ), Rhodium(III) and Iridium(III)

et al. 1970

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Chloropentaamminecobalt(III) chloride, chloropentaamminerhodium(III) chloride and chloropentaammineiridium (III) chloride labelled with 3e Cl in the cation have been irradiated with thermal neutrons in a flux of 10 11 neutrons cm -2 sec -1 for ten hours. Study of the effects of the (η, γ) reaction has shown that, in the case of the cobalt and rhodium complexes, there is retention of the "CI in the cation, but in the case of the iridium complex about 90% of the Ir-M Cl bonds are broken whilst only one in 10 e iridium atoms are activated. The results are interpreted using a modification to the hot zone theory of HARBOTTLE and SUTIN. An attempt has been made to identify some of the species formed upon dissolution in water. ZusammenfassungIm Kation mit 3e Cl markiertem Chloropentaamminkobalt(III)-chlorid, Chloropentaamminrhodium(III)chlorid und Chloropentaamminiridium(III)chlorid wurden mit thermischen Neutronen in einem Fluß von 10" Neutronen cm~2 sec -1 zehn Stunden lang bestrahlt. Die Untersuchung der Auswirkungen der (n, y)-Reaktion hat gezeigt, daß bei den Kobalt-und Rhodiumkomplexen eine Rückhaltung des 3e Cl im Kation eintritt, während beim Iridiumkomplex rund 90% der Ir-3e ClBindungen zerstört werden, wogegen nur eines von 10® Iridiumatomen aktiviert wird. Zur Interpretation der Ergebnisse dient eine Modifikation von HARBOTTLE und SUTINS Theorie der heißen Zonen. Es ist versucht worden, einige der bei Auflösung in Wasser gebildeten Arten zu identifizieren. ResumeOn a irradie par neutrons thermiques sous un flux de 10" neutrons cm -2 s -1 pendant 10 heures les chlorures de chloropentamminocobalt(III), chloropentamminorhodium(III) et chloropentamminoiridium(III) dont les cations ont ete marques par 3e Cl. L'etude des effets obtenus par reaction (η, γ) a montre que pour les complexes du cobalt et du rhodium il y a une retention de 3e Cl dans le cation, alors que dans le cas du complexe de l'iridium quelques 90% des liaisons Ir-^Cl sont rompues, et seulement un atome sur 10® atomes d'iridium se trouve active. On explique ces resultats par une modification de la theorie de la zone chaude proposee par HARBOTTLE et SUTIN. On a essaye d'identifier quelques-unes des especes qui se sont formees apres dissolution dans l'eau.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical Effects of the (n, γ) Reaction in Chloropentaammine Complexes of Cobalt (IIΙ), Rhodium(III) and Iridium(III)

et al. 1970

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“…Dimotakis and coworkers in two articles (14,23) studied the recoil reaction of tris(ethylenediamine)cobalt(III) nitrate. They reported initial total retentions of 65% and 61% in which the total integrated neutron fluxes were 4.1 x 10^^ and 9.1 x 10^^ n/cm^, respectively.…”

Section: +mentioning

confidence: 99%

Szilard-Chalmers and thermal annealing processes in d-tris(ethylenediamine)cobalt(III) nitrate

Bonte

Martin

1977

Journal of Inorganic and Nuclear Chemistry

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“…The effect of anion Y on the the retention of cobalt in complexes of the type [CO(NH3)5X]Y2 and other cobalt amine complexes has also been investigated [5,6]. Studies have been carried out using optical and geometric isomers of cobalt complexes [7,8,9] to determine the interconversion caused by irradiation but results vary for different complexes. GARDNER et al [10] have recently studied the (n,y) reaction in [Co(NH 3 ) 5 Cl]Cl 2 in which both M C1 and eo Co were used as tracers.…”

Section: Introductionmentioning

confidence: 99%

Chemical Effects of the (n,y) Reactions in Dichlorotriethylene Tetramine Complexes of Cobalt (111) and Rhodium(lll)

1970

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Cis -cobalt( 111) and rhodium( 111) dichlorotriethylene tetramine chloride which were labelled with 3e CI in the anion and cation, trans-dichlorotriethylene tetramine cobalt(lll) chloride labelled with 3, C1 in the anion and cation, and cis-and transdichlorotrien cobalt (111) chloride labelled with e0 Co in the metal atom, have been irradiated with thermal neutrons in a flux of 10 u neutrons cm -2 sec -1 for ten hours. Study of the effects of the (n,y) reaction has shown that in the case of cis-dichlorotriethylenetetramine cobalt(lll) chloride after irradiation the amount of new product cations are about five times (by chloride labelling) to seven times (by cobalt labelling) the amount of original cation left. JVcros-dichlorotriethylene tetramine cobalt (111) chloride and cis-dichlorotriethylene tetramine rhodium(lll) chloride, show a ratio of 2:1 new product cations to original cation as measured by cobalt labelling. When the anions are considered, it has shown that with cis-dichlorotriethylene tetramine cobalt(lll) chloride the amount of chloride ion left after irradiation is about half of the starting amount.Traiu-dichlorotriethylene tetramine cobalt (111) chloride shows about the same amount of chloride ion left after irradiation as before irradiation, whilst cis-dichlorotriethylene tetramine rhodium (111) chloride shows about one half to three-quarters of the chloride ion present after irradiation. A unique feature of the results is that from 200,000 to 500,000 Metal-Cl bonds are broken for each n,y reaction, suggesting that the HARBOTTLE and STJTIN hot zone model must be expanded to include a larger number of molecules. ZusammenfassungIm Anion und Kation mit 3e Cl markiertes cis-Kobalt(lll)-und -Rhodium(lll)dichlortriäthylentetraminchlorid, im Anion und Kation mit '"Cl markiertes

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Annealing Behaviour of Some Salts of Trisethylenediamine Cobalt III

Cited by 10 publications

References 11 publications

Chemical Effects of the (n, γ) Reaction in Chloropentaammine Complexes of Cobalt (IIΙ), Rhodium(III) and Iridium(III)

Chemical Effects of the (n, γ) Reaction in Chloropentaammine Complexes of Cobalt (IIΙ), Rhodium(III) and Iridium(III)

Szilard-Chalmers and thermal annealing processes in d-tris(ethylenediamine)cobalt(III) nitrate

Chemical Effects of the (n,y) Reactions in Dichlorotriethylene Tetramine Complexes of Cobalt (111) and Rhodium(lll)

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