The First Cationic Complex of Tetravalent Cerium

Abstract The recently reported cerium(IV) tripodal Schiff‐base complex (TRENDSAL)CeCl (TRENDSAL = [N{CH 2 CH 2 N=CH(C 6 H 2 t Bu 2 ‐3,5‐O‐2} 3 ] 3– ) serves as excellent starting material for novel Ce 4+ coordination compounds. The first cerium(IV) azide, (TRENDSAL)CeN 3 and the first cationic cerium(IV) complex, [(TRENDSAL)Ce][BPh 4 ] are both readily accessible from (TRENDSAL)CeCl via simple salt metathesis reaction.