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Direct Synthesis of Heterometallic Europium/Barium Complexes: H 2 [Eu 2 Ba 6 O 2 (O i Pr) 16 (THF) 4 ] and EuBa 2 (OC 6 H 4 Me‐4) 7 (diglyme) 2 (DME)
Author(s) -
Evans William J.,
Giarikos Dimitrios G.,
Greci Michael A.,
Ziller Joseph W.
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(20022)2002:2<453::aid-ejic453>3.0.co;2-4
Subject(s) - diglyme , chemistry , dimethoxyethane , europium , barium , crystallography , metal , inorganic chemistry , organic chemistry , solvent , electrolyte , ion , electrode
Convenient syntheses of mixed‐metal Eu/Ba complexes starting from the elemental metals have been explored. A mixture of europium and barium ingots reacts in boiling 2‐propanol to form a product which crystallizes from THF as the heterometallic complex formulated as H 2 [Eu 2 Ba 6 O 2 (O i Pr) 16 (THF) 4 ] ( 1 ). An analogous reaction in the presence of p ‐cresol (HOC 6 H 4 Me‐4) forms trimetallic EuBa 2 (OC 6 H 4 Me 4 ) 7 (diglyme) 2 (DME) ( 2 ), after recrystallization from THF/DME/diglyme (DME = 1,2‐dimethoxyethane). Complex 1 exhibits an octametallic geometry comprised of two square pyramids with coplanar bases which share a basal edge and have apices on opposite sides. The six barium atoms occupy the basal positions and the two europium atoms are at the apices. Complex 2 exhibits a triangular arrangement of metal atoms with both terminal and bridging aryloxide ligands coordinated to the europium atom and bridging aryloxide and terminal ether ligands coordinated to the barium atoms.