Ionic Strength Dependence of Formation Constants, Complexation of Asparagine with Dioxovanadium(V)

Authors: Gharib F.¹; Aghaei H.²; Shamel A.²

Source: Physics and Chemistry of Liquids, Volume 40, Number 5, 1 January 2002 , pp. 637-648(12)

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Abstract:

The stability constants of the complexes between dioxovanadium(V) ion and l-asparagine, at different ionic strengths ranging from 0.1 to 1.0 mol dm^-3 and 25°C were determined using a combination of potentiometric and spectrophotometric techniques. Sodium perchlorate solution was used to maintain the ionic strength. The parameters based on the formation constants were calculated and the dependence of protonation and the stability constants on ionic strength are described by a semi-empirical Debye-Huckel type equation.

Keywords: Stability constant; Ionic strength; Asparagine; Dioxovanadium(V)

Document Type: Research article

Affiliations: 1: Chemistry Department, Shahid Beheshti University, Tehran, Evin, Iran 2: Chemistry Department, Islamic Azad University, Science and Research Branch, Tehran, Hesarak, Iran

Publication date: 2002-01-01