Preparation of actinide bromides and bromo-complexes by use of liquid boron tribromide or liquid bromine

Abstract

Actinide bromides and bromo-complexes have been prepared by use of liquid bromide or liquid boron tribromide; new preparative methods are described for protactinium pentabromide, neptunium tetrabromide, hexabromoprotactinates(V), and hexabromouranates(V). New uranium pentabromide–phosphine oxide complexes of the type UBr₅L (L = triphenylphosphine oxide or hexamethylphosphoramide) and the actinide tetrabromide–methyl cyanide adducts NpBr₄,MeCN and PuBr₄,4MeCN have been prepared. Some chemical properties, i.r. and visible spectral studies, and X-ray powder diffraction results are reported for these compounds.