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Solvent Effects on Complexation of Molybdenum(VI) with Nitrilotriacetic Acid in Different Aqueous Solutions of Propanol
Author(s) -
Mohammadi Behrouz,
Mohammadi Jalal
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790056
Subject(s) - chemistry , nitrilotriacetic acid , molybdenum , sodium perchlorate , aqueous solution , inorganic chemistry , potentiometric titration , ionic strength , solvent , perchlorate , propanol , ion , organic chemistry , ethanol , chelation , electrode , electrochemistry
By using spectrophotometric and potentiometric techniques the formation constants of the species formed in the systems H + +Mo(VI)+nitrilotriacetic acid and H + +nitrilotriacetic acid have been determined in aqueous solutions of propanol at 25 °C and constant ionic strength 0.1 mol·dm −3 sodium perchlorate. The composition of the complex was determined by the continuous variation method. It was shown that molybdenum(VI) forms a mononuclear 1:1 complex with nitrilotriacetic acid of the type MoO 3 L −3 at −lg[H + ]=5.8. The formation constants in various media were analyzed in terms of Kamlet and Taft's parameters. Linear relationships were observed when lg K S was plotted versus p *. Finally, the results were discussed in terms of the effect of solvent on complexation.