Complexes between tributyl phosphate and inorganic nitrates

摘要: Many inorganic nitrates dissolve freely in tributyl phosphate (TBP), forming complexes with the solvent. TBP saturated uranyl nitrate, for example, corresponds exactly to composition UO2(NO3)2. 2TBP and has a sharp melting-point of −6°C; no other complex involving nitrate appears be any significance. There is only slight ionisation phase. A useful general method determining number molecules attached by partition experiments between water. The aqueous phase kept constant while an inert diluent, e.g. benzene or kerosene, added TBP; trace question then measured at series dilutions. At high dilutions limiting law form: Partition coefficient ∼ (TBP Concentration)n is obtained, which exponent n gives complex. following formulae have been established different complexes: In all except first central atom co-ordinated six groups (O, NO3 TBP). However cases, alkali metal nitrates, co-ordination probably lower.