Some oxygen-donor complexes of acetylacetonatotrichlorothorium(IV), bis(acetylacetonato)-dichloro- and -di-N-thiocyanato-thorium(IV) and -uranium(IV)

Abstract

The oxygen-donor complexes [Th(acac)Cl₃(dipiba)₂](Hacac = MeCOCH₂COMe, dipiba = Me₂CHCONPrⁱ₂), [Th(acac)₂Cl₂(thf)₂](thf = tetrahydrofuran), [U(acac)₂Cl₂(dipiba)], and [M(acac)₂(NCS)₂L₂](M = Th or U; L = thf, dipiba, EtCONPrⁱ₂, or PPrⁱ₃O) have been prepared. The i.r., near i.r.-visible [uranium(IV) compounds only], and ¹H n.m.r, spectra [thorium(IV) compounds only] are reported, and using a cone-packing model their stoicheiometries are discussed in terms of the steric crowding about the metal atom.