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Synthesis and Structure of the Cerium Schiff‐Base Complexes [Ce(Salen′) 2 ] and [(THF) 2 KCe(Salen′) 2 ]
Author(s) -
Gottfriedsen Jochen,
Spoida Marlies,
Blaurock Steffen
Publication year - 2008
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.200700451
Subject(s) - ethylenediamine , cerium , schiff base , metal salen complexes , chemistry , medicinal chemistry , toluene , ligand (biochemistry) , boiling , polymer chemistry , inorganic chemistry , catalysis , organic chemistry , biochemistry , receptor
Abstract The synthesis of [Ce(Salen′) 2 ] ( 1 ) (H 2 Salen′ = N,N′ ‐bis(3,5‐di‐ tert ‐butylsalicylidene)ethylenediamine) was performed using two different approaches. CeCl 3 reacts with two equivalents of K 2 Salen′ in THF under the formation of [(THF) 2 KCe(Salen′) 2 ] ( 2 ). Complex 2 could be converted to the Ce IV complex 1 via oxidation with p ‐benzoquinone and air, respectively. The reversible reduction process was realized using elemental potassium in boiling THF. Furthermore, the reaction of the Ce IV starting material [( t BuO) 4 Ce(THF) 2 ] with the “free” ligand H 2 Salen′ in boiling toluene lead in the formation of 1 as well.