Complexes of Lanthanide Nitrates with Tri Tert Butylphosphine Oxide
作者： Allen Bowden , Simon J. Coles , Mateusz B. Pitak , Andrew W. G. Platt
DOI: 10.1021/IC300142R
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摘要: Reaction of lanthanide nitrates with tBu3PO (=L) lead to the isolation complexes Ln(NO3)3L2·H2O·nEtOH (Ln = La (1), Nd(2)), Ln(NO3)3L2 ·nEtOH (Sm(3), Eu(4)), and Ln(NO3)3L2 (Dy(5), Er(6), Lu(7)). These have been characterized by elemental analysis, infrared NMR(1H, 13C 31P) spectroscopy single-crystal X-ray diffraction. The structures show L be positioned on opposite sides metal forming an equatorial band. When Ln Dy, Er, Lu two distinct molecules are present in unit cell. A major isomer (70%) has a (P)O–Ln–O(P) angle less than 180° one nitrate ligands twisted out plane other while lower abundance is more symmetric coplanar giving hexagonal bipyramidal geometry. isomers cannot observed variable temperature solution 31P NMR measurements but clearly seen solid-state spectrum complex. Variable solid...
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