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Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   SUMMER 2006 , Volume 16 , Number 60 (CHEMISTRY ISSUE); Page(s) 1 To 11.
 
Paper: 

INVESTIGATION OF THE EFFECT OF E AND F PARAMETERS ON THE MINIMIZED ERROR FUNCTION IN THE CALCULATION OF STABILITY CONSTANTS FOR TUNGSTEN (VI) AND MOLYBDENUM (VI) COMPLEXES WITH NITRILOTRIACETIC ACID AND GLUTAMIC ACID AT DIFFERENT IONIC STRENGTHS

 
 
Author(s):  MAJLESI K.*, ZARE KARIM
 
* CHEMISTRY DEPARTMENT, SCIENCE AND RESEARCH CAMPUS, ISLAMIC AZAD UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

The formation constants of species formed in the systems H++W (VI) + nitrilotriacetic acid and H++ nitrilotriacetic acid have been determined in aqueous solution for pH=4-9 at 25oC and different ionic strengths ranging from (0.1 to 1.0) mol dm-3 (NaClO4), using potentiometric and spectrophotometric techniques. It was shown that tungsten (VI) forms a mononuclear 1:1 complex with NTA of the type (WO3L3-) at pH=7.5. The composition of the complex was determined by the continuous variations method.
The complexation of molybdenum (VI) with glutamic acid was investigated in aqueous solution ranging in pH from 4 to 9, using polarimetric, potentiometric and spectrophotometric techniques. The composition of the complex was determined by the continuous variations method. It was shown that molybdenum (VI) forms a mononuclear 1:1 complex with glutamic acid of the type (MoO3L2-) at pH=6.0. The dissociation constants of glutamic acid and the stability constants of the complex were determined at 25oC and at ionic strengths ranging from (0.1 to 1.0) mol dm3- sodium perchlorate.
In both complex formation reactions by introducing two new parameters, E and F, the dependence of the dissociation and stability constants on ionic strength is described by a Debye-Huckel type equation and the effect of the aforementioned parameters on the minimized error function is discussed. Finally, a comparison has been made between the patterns of ionic strength dependence for the two complexes and the results have been compared with data previously reported.

 
Keyword(s): IONIC STRENGTH, TUNGSTEN (VI), MOLYBDENUM (VI), NTA, GLUTAMIC ACID, STABILITY CONSTANT, ERROR FUNCTION
 
 
References: 
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Cite:
APA: Copy

MAJLESI, K., & ZARE, K. (2006). INVESTIGATION OF THE EFFECT OF E AND F PARAMETERS ON THE MINIMIZED ERROR FUNCTION IN THE CALCULATION OF STABILITY CONSTANTS FOR TUNGSTEN (VI) AND MOLYBDENUM (VI) COMPLEXES WITH NITRILOTRIACETIC ACID AND GLUTAMIC ACID AT DIFFERENT IONIC STRENGTHS. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 16(60 (CHEMISTRY ISSUE)), 1-11. https://www.sid.ir/en/journal/ViewPaper.aspx?id=103098



Vancouver: Copy

MAJLESI K., ZARE KARIM. INVESTIGATION OF THE EFFECT OF E AND F PARAMETERS ON THE MINIMIZED ERROR FUNCTION IN THE CALCULATION OF STABILITY CONSTANTS FOR TUNGSTEN (VI) AND MOLYBDENUM (VI) COMPLEXES WITH NITRILOTRIACETIC ACID AND GLUTAMIC ACID AT DIFFERENT IONIC STRENGTHS. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY). 2006 [cited 2021April12];16(60 (CHEMISTRY ISSUE)):1-11. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=103098



IEEE: Copy

MAJLESI, K., ZARE, K., 2006. INVESTIGATION OF THE EFFECT OF E AND F PARAMETERS ON THE MINIMIZED ERROR FUNCTION IN THE CALCULATION OF STABILITY CONSTANTS FOR TUNGSTEN (VI) AND MOLYBDENUM (VI) COMPLEXES WITH NITRILOTRIACETIC ACID AND GLUTAMIC ACID AT DIFFERENT IONIC STRENGTHS. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), [online] 16(60 (CHEMISTRY ISSUE)), pp.1-11. Available at: <https://www.sid.ir/en/journal/ViewPaper.aspx?id=103098>.



 
 
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