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Petrov, A. I.
Dergachev, I. D.
Golovnev, N. N.
2017-06-16T10:22:33Z
2017-06-16T10:22:33Z
2016-05
Petrov, A. I. Coordination model, stability constants, and kinetics study of cystamine and L-cystine with [PdCl4](2-) in hydrochloric aqueous solutions [Текст] / A. I. Petrov, I. D. Dergachev, N. N. Golovnev // Journal of Coordination Chemistry. — 2016. — Т. 69 (№ 5). — С. 748-762
00958972
http://elib.sfu-kras.ru/handle/2311/32955
Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Stoichiometry, equilibria, and kinetics of [PdCl4](2-) interactions with l-cystine (H(4)CysS(2+)) and cystamine (H(2)Cyst(2+)) have been investigated spectrophotometrically in strong hydrochloric acidic media. Interactions lead to the formation of highly stable S/(S,N)-coordinated binuclear, and then with excess [PdCl4](2-) trinuclear (S,S,N) or tetranuclear (S,S,N,N) species without disulfide bond cleavage. The reaction of [PdCl4](2-) with H(4)CysS(2+) or H(2)Cyst(2+) at [PdCl4](2-) excess has irreversible first-order kinetics, and with H(4)CysS(2+) or H(2)Cyst(2+) excess, by irreversible parallel reaction of [PdCl4](2-) addition to the ligand. The influence of leaving groups on the kinetics has been explained in terms of formation of stable ionic pairs with complex species and of efficient overlap of d and p orbitals in a transition state. The reactions proceed through an associative mechanism with the first step being formation of the S-coordinated complex. Coordination models and mechanisms have been proposed. Applicability of spectrophotometry for establishment of disulfide bond state in organic disulfides in complexation processes has been demonstrated.
http://www.tandfonline.com/doi/full/10.1080/00958972.2016.1139095
Palladium(II)
organic disulfides
kinetics
stability constant
spectrophotometry
Coordination model, stability constants, and kinetics study of cystamine and L-cystine with [PdCl4](2-) in hydrochloric aqueous solutions
Journal Article
Published Journal Article
748-762
31.17.29
2017-06-16T10:22:33Z
10.1080/00958972.2016.1139095
Институт цветных металлов и материаловедения
Кафедра физической и неорганической химии
Journal of Coordination Chemistry
Q2
Q3


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