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Synthesis and X‐ray Crystal Structure of [U(η‐C 8 H 8 )(HMPA) 3 ][BPh 4 ], the First Cationic Monocyclooctatetraenyl Compound of Uranium (III), and its Neodymium Homologue
Author(s) -
CendrowskiGuillaume Sophie M.,
Nierlich Martine,
Ephritikhine Michel
Publication year - 2001
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(200106)2001:6<1495::aid-ejic1495>3.0.co;2-j
Subject(s) - chemistry , neodymium , crystal structure , uranium , ligand (biochemistry) , crystallography , dication , yield (engineering) , cationic polymerization , inorganic chemistry , stereochemistry , medicinal chemistry , ion , polymer chemistry , organic chemistry , laser , physics , materials science , optics , metallurgy , biochemistry , receptor
The title compound was synthesized in 88% yield by reducing the uranium(IV) dication [U(COT)(HMPA) 3 ][BPh 4 ] 2 (COT = η‐C 8 H 8 ) with sodium amalgam while the neodymium analogue was prepared by substitution of the THF ligands in [Nd(COT)(THF) 4 ][BPh 4 ]. Comparison of the crystal structures of the complexes [M(COT)(HMPA) 3 ][BPh 4 ] (M = U, Nd, Sm) shows that the variations in the M−ligand bond lengths simply reflect the differences in the ionic radii of the metals.