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Synthesis and Structural Characterization of Tetra‐ and Pentanuclear Lanthanide Hydroxido Clusters
Author(s) -
Datta Simmi,
Baskar Viswanathan,
Li Henan,
Roesky Peter W.
Publication year - 2007
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/ejic.200700328
Subject(s) - lanthanide , chemistry , tetra , crystallography , coordination sphere , deprotonation , square pyramid , triethylamine , square pyramidal molecular geometry , moiety , molecule , crystal structure , stereochemistry , medicinal chemistry , ion , organic chemistry
Tetra‐ and pentanuclear lanthanide clusters having dibenzoylmethanido and o ‐nitrophenolato as ligands in the coordination sphere were prepared. Treating [LnCl 3 · 6H 2 O] (Ln = Er, Tm) with dibenzoylmethane and o ‐nitrophenol in the presence of triethylamine yielded the pentanuclear lanthanide clusters HNEt 3 + [Ln 5 (μ 3 ‐OH) 4 (μ 4 ‐OH)(Ph 2 acac) 7 ( o ‐O 2 NC 6 H 4 O) 3 Cl] – (Ln = Er, Tm). Under the same reaction conditions but using Yb and Lu as center metals, tetranuclear lanthanide clusters [Ln 4 (μ 3 ‐OH) 2 (Ph 2 acac) 8 ( o ‐O 2 NC 6 H 4 O) 2 ] (Ln = Yb, Lu) were obtained. The structures of all new compounds were confirmed by single‐crystal X‐ray diffraction. The anions of the pentanuclear lanthanide cores are square pyramidal. Each triangular face of the square pyramid is capped by one μ 3 ‐O moiety. In the square base, four lanthanide atoms are linked by one μ 4 ‐O atom. The formation of the hydroxido bridges can be explained by deprotonation of the coordinated water molecules.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)