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Controlling Complexation Behavior of Early Lanthanides via the Subtle Interplay of their Lewis Acidity with the Chemical Stability of 5,5'‐(Azobis)tetrazolide
Author(s) -
Weinberger Peter,
Giester Gerald,
Steinhauser Georg
Publication year - 2020
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.202000384
Subject(s) - isostructural , lanthanide , chemistry , aqueous solution , denticity , ligand (biochemistry) , decomposition , crystallography , inorganic chemistry , crystallization , chemical stability , medicinal chemistry , lewis acids and bases , crystal structure , ion , organic chemistry , catalysis , receptor , biochemistry
Two novel nitrogen‐rich lanthanide compounds of 5,5'‐( azo bis )tetrazolide (ZT) were synthesized and structurally characterized. The dinuclear, isostructural compounds [Ce 2 (ZT) 2 CO 3 (H 2 O) 12 ] · 4 H 2 O ( 1 ) and [Pr 2 (ZT) 2 CO 3 (H 2 O) 12 ] · 4H 2 O ( 2 ) were synthesized via two independent routes. Compound 1 was obtained after partial Lewis acidic decomposition of ZT by Ce IV in aqueous solution of (NH 4 ) 2 Ce(NO 3 ) 6 and Na 2 ZT. Compound 2 was obtained by crystallization from aqueous solutions of Pr(NO 3 ) 3 , Na 2 ZT, and Na 2 CO 3 . By X‐ray diffraction analysis at 200 K, it was found that the trivalent lanthanide cations are bridged by a bidentate carbonato ligand and each cation is further coordinated by six H 2 O ligands and one ZT ligand thus being ninefold coordinated.