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Thermodynamic complexation of dopamine with magnesium (II) in media with different dielectric constants

Bagheri, A ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1515/MGMC.2008.31.1-2.81
  3. Publisher: Walter de Gruyter GmbH , 2008
  4. Abstract:
  5. The solution equilibria of magnesium (II) complex formed with bidentate ligand of dopamine in acidic media (pH=∼4-∼6) have been studied in cosolvent systems at 15, 25, 35 ± 0.1° C and 1=0.2 mol.dm-3 sodium chloride, using phosphate buffer, with spectrophotometric methods. Evidence for the 2:1 complex was not observed for magnesium. The stability constant of the complex was determined KMg(HL)+ = ∼9 and the resulting free-energy changes obtained. The protonation constant of dopamine was determined under the above conditions. The results are discussed in terms of the effect of solvent on protonation and complexation
  6. Keywords:
  7. Thermodynamic complexation ; Dopamine ; Magnesium (II) ; Complexation ; Dielectric ; Solvent ; Spectrophotometric
  8. Source: Main Group Metal Chemistry ; Volume 31, Issue 1-2 , 2008 , Pages 81-91 ; 07921241 (ISSN)
  9. URL: https://www.degruyter.com/document/doi/10.1515/MGMC.2008.31.1-2.81/html