Equilibrium constants determination for ligand substitution of alkylcobaloximes and alkylcobaloximes/β-CD by ammonia in aqueous solution

Ying Chen, Hui Lan Chen, Yin Gu

Research output: Contribution to journalArticle

Abstract

The axial coordinate water substitution reactions of alkylaquacobaloximes (alkyl = n-C3H7, n-C4H9, i-C4H9, n-C5H11, Br(CH2)3, PhCH2) by ammonia in aqueous solution were studied in the absence and presence of β-cyclodextrin (β-CD). The equilibrium constants were measured by UV-vis spectroscopy. It has been found that (i) comparing with that in the absence of β-CD, the equilibrium constant were influenced slightly in the presence of β-CD, (ii) with increasing electron-withdrawing ability of the alkyl groups, the equilibrium constants were increased.

Original languageEnglish (US)
JournalChinese Journal of Inorganic Chemistry
Volume15
Issue number4
StatePublished - 1999
Externally publishedYes

Fingerprint

Equilibrium constants
Ammonia
Substitution reactions
Ligands
Cyclodextrins
Ultraviolet spectroscopy
Electrons
Water

Keywords

  • β-cyclodcxtrin
  • Alkylcobaloxime
  • Substitution reaction

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Equilibrium constants determination for ligand substitution of alkylcobaloximes and alkylcobaloximes/β-CD by ammonia in aqueous solution. / Chen, Ying; Chen, Hui Lan; Gu, Yin.

In: Chinese Journal of Inorganic Chemistry, Vol. 15, No. 4, 1999.

Research output: Contribution to journalArticle

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AB - The axial coordinate water substitution reactions of alkylaquacobaloximes (alkyl = n-C3H7, n-C4H9, i-C4H9, n-C5H11, Br(CH2)3, PhCH2) by ammonia in aqueous solution were studied in the absence and presence of β-cyclodextrin (β-CD). The equilibrium constants were measured by UV-vis spectroscopy. It has been found that (i) comparing with that in the absence of β-CD, the equilibrium constant were influenced slightly in the presence of β-CD, (ii) with increasing electron-withdrawing ability of the alkyl groups, the equilibrium constants were increased.

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