New Complexes of Actinides with Monobromoacetate Ions: Synthesis and Structures.

Synthesis, FTIR spectral study, and X-ray diffraction analysis of single crystals of (CH)N[UO(mba)] (), (CH)N[NpO(mba)(NO)] (), (CH)N[PuO(mba)(NO)] (), and (CH)N[NpO(mba)(NO)] (), where mba is a monobromoacetate ion (CHBrCOO), were conducted. The main structural units of crystals - are mononuclear anionic complexes of the [AnO(mba)], [AnO(mba)(NO)], or [AnO(mba)(NO)] composition. All these complex units are characterized with the same crystal-chemical formula ( = AnO and = CHBrCOO or NO ).

Halogen bonding in uranyl and neptunyl trichloroacetates with alkali metals and improved crystal chemical formulae for coordination compounds.

The structures of the single crystals of compounds KUO(tca)(tcaH) (I), KNpO(tca)(tcaH)(HO) (II), RbUO(tca)(tcaH)(HO) (III), and CsUO(tca)(tcaH)·HO (IV), where tca is the trichloroacetate ion, were established by X-ray diffraction analysis. The crystals of II-IV have a framework structure, whereas in the layered crystals of I, neighboring layers are connected to each other via halogen bonds. In this regard, the crystals of I possess perfect cleavage along the (001) plane: the crystals are easily cut into stacks of very thin layers.

Peculiarities of the Supramolecular Assembly of Tetraethylammonium and 3-Bromopropionate Ions in Uranyl, Neptunyl, and Plutonyl Coordination Compounds.

Synthesis and X-ray diffraction studies of {N(CH)}[AnO(CHBrCOO)] [An = U (), Np (), or Pu ()] and CHBrCOOH (), where CHBrCOO is an anion of the 3-bromopropionic acid, are reported. The isostructural coordination compounds - contain mononuclear anionic complexes [AnO(CHBrCOO)] belonging to the crystal chemical group AB (A = AnO; B = CHBrCOO). In the crystal structure of , the CHBrCOOH molecules are hydrogen bonded into centrosymmetric dimers R(8).

Syntheses, Crystal Structures, and Nonlinear Optical Activity of CsBa[AnO(CHCOO)] (An = U, Np, Pu) and Unprecedented Octanuclear Complex Units in KR(HO)[UO(CHCOO)] (R = Sr, Ba).

X-ray diffraction was applied to the elucidation of crystal structures of single crystals of CsBa[AnO(CHCOO)], where An = U(I), Np(II), Pu(III), and KR(HO)[UO(CHCOO)], where R = Sr(IV), Ba (polymorphs V-a and V-b). FTIR spectra were analyzed for the uranium-containing crystals I, IV, and V-b. Isostructural cubic crystals I-III are constructed of typical mononuclear anionic complex units [AnO(CHCOO)] and charge-balancing Cs and Ba cations.

Synthesis and X-ray Crystallography of [Mg(H2O)6][AnO2(C2H5COO)3]2 (An = U, Np, or Pu).

Synthesis and X-ray crystallography of single crystals of [Mg(H2O)6][AnO2(C2H5COO)3]2, where An = U (I), Np (II), or Pu (III), are reported. Compounds I-III are isostructural and crystallize in the trigonal crystal system. The structures of I-III are built of hydrated magnesium cations [Mg(H2O)6](2+) and mononuclear [AnO2(C2H5COO)3](-) complexes, which belong to the AB(01)3 crystallochemical group of uranyl complexes (A = AnO2(2+), B(01) = C2H5COO(-)).