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Polarographic reduction of monochloro-pentammine cobaltic chloride in presence of α-aminoacids

✍ Scribed by W.U. Malik; M. Aslam

Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
234 KB
Volume
13
Category
Article
ISSN
0013-4686

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✦ Synopsis

Abslmct-The interaction of monochloro-pentammine cobaltic chloride with different a-amino acids results in the formation of comparatively more stable complexes of the general formula [Co(NH~),(Amino acid)]CII. The composition and stability constants have been determined polarographically. The stability constants of the complexes containing glycine, dl-valine, l-threonine, r&erine and dl-isoleucine are 1.365 x lW, l-191 x lo*, 1.663 x 10, 6.261 x 10' and 2.868 x lo* respectively. R&sum&L'interaction du chlorure cobalti-monochloro-pentammine avec differents a-amino-acides se manifeste dans la formation de complexes comparativement plus stables de formule @r&ale [Co(NH&(amino-acide)]C&. On a d&ermine polarographiquement la composition et les constantes de stabilitb. Les constantes de stabilite des complexes coordinant la glycine, la&Wine, lr I-threonine, la dl-mine et la df-isoleucine sont respectivement 1,365. 10; 1,91 . 10'; 1,663 . KY; 6,261 . 10' et 2,868. lo*. Zosammenfassnog-Monochlor-Pentamin-Kobalt (II)-Chlorid bildet mit verschiedenen a-Aminosauren vergleichsweise stabilere Komplexe der allgemeinen Formel [Co(NH&&4minos&re)]Cl~. Die Zusammensetzung und die Stabilitiitskonstanten wurden polarographisch bestimmt. Die Stabilitltskonstanten der Komplexe sind: Glyzin 1,365 x lo"; dl-Valine 1,191 x lO';l-Threonin 1,663 x lp; dl-Serin 6,261 x 10% und dl-Isoleuzin 2,868 x 10".

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