Dioxouranium(VI) complexes with N-salicylsalicylaldimines and their Lewis base adducts

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Abstract
New dioxouranium(VI) complexes with the dibasic terdentate Schiff bases, XC6H3(2-OH)CH=N-CH2C6H4(2?-OH) (X = H, 5-Cl or 3-MeO), have been synthesized and characterized as their 1 : 1 alcohol adducts. The labile alcohol molecules in these complexes are readily replaced by various oxygen or nitrogen donor ligands, affording six- or seven- coordinate complexes. Evidence is presented for the rather weak coordination of these Lewis bases to the uranium metal atom. The various possible conformations for these [6,6]-membered chelate complexes are also discussed.

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