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Synthesis and Characterization of Ga III , Y III , and Lu III Complexes with Etifenin and Analogues
Author(s) -
PfeiferLeeg Michel,
Szabó Gergely,
Baranyai Zsolt,
Niksch Tobias,
Weigand Wolfgang,
Freesmeyer Martin
Publication year - 2016
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201600016
Subject(s) - protonation , spectroscopy , chemistry , nuclear magnetic resonance spectroscopy , chelation , stability constants of complexes , characterization (materials science) , crystallography , nuclear chemistry , analytical chemistry (journal) , inorganic chemistry , stereochemistry , ion , materials science , aqueous solution , physics , organic chemistry , nanotechnology , quantum mechanics
Abstract Complexes of etifenin ( 1a ), disofenin ( 1b ), and mebrofenin ( 1c ) with Ga III , Y III , and Lu III were synthesized and characterized by NMR spectroscopy and UV/Vis spectroscopy. Stability and protonation constants of the complexes of 1a were determined by potentiometry and distribution diagrams were calculated. It was shown that the Y III and Lu III species are most stable as bis chelates at higher pH, whereas the Ga III complex degrades at pH < 4.5.