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Komplexe XXXVII. Die EDTA‐Komplexe des Vanadiums(V)
Author(s) -
Przyborowski L.,
Schwarzenbach G.,
Zimmermann Th.
Publication year - 1965
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19650480716
Subject(s) - chemistry , protonation , vanadium , alkali metal , equilibrium constant , stability constants of complexes , medicinal chemistry , inorganic chemistry , nuclear chemistry , aqueous solution , organic chemistry , ion
By adding EDTA to a solution of metavanadate, the complex VO 2 Y 3− or its protonated forms VO 2 HY 2− and VO 2 H 2 Y − are produced. A number of cristallized salts containing these anions have been prepared and characterized. The stability constants of the complexes have been obtained photometrically. In the reaction of the complex with alkali, VO 2 Y 3− is in equilibrium with H 2 VO 4 − and HVO 4 2− , and its study furnishes also the equilibrium: 2 H 2 O + VO 2 + ⇌ H 2 VO 4 − + 2 H + . The effective stability of the 1:1‐Vanadium(V)‐EDTA complex over the entire pH‐range is given.