Mixed ethylenediaminetetraacetic compounds of Uranium(IV) and Thorium(IV)

• Published in: Inorganica Chimica Acta Vol. 94; no. 1; pp. 77 - 78
• Main Authors: Shchelokov, R.N., Bolotova, G.T., Sergeev, A.V., Gilov, V.A., Mikhailov, Yu.N., Lobanova, G.M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.1984
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/S0020-1693(00)94541-9

Recently some uranyl mixed complexes, containing ethylenediaminetetraacetic (edta) and other anions have been synthesized and crystal structure of the (CH 3H 6) 4[(UO 2) 2edtaF 4] has been determined [1]. The edta group is shown to be a bridge hexadentate ligand with planar conformation of the NCN 2CH 2N fragment. As continuation of this work some other complexes of the U(IV) and Th(IV), namely M 4[U(Th)edta(CO 3) 2]; M 4[Uedta(c 2O 4) 2]· 3H 2O;M 3[U(Th)edta·F 3]; M 2[UedtaCl 2·4H 2O]; U(Th)edta·6H 2O (M CN 3H + 6) were synthesized and their properties such as conductivity in water solutions, IR-spectra, thermostability were investigated. The structure of the (CN 3H 6) 3[UedtaF 3] and isomorphous (CN 3H 6) 3[ThedtaF 3] was determined by X-ray analysis. The coordination polyhedron of these compounds was shown to be a distorted square antiprism with the cap over one base (C.N.9). The edta group is hexadentate and ethylenediamine fragment has gosh-conformation. The structure is constituted by the separate complex [U(Th)edtaF 3] 3− anions and (CH 3H 6) + cations. the hydrogen bonds NH⋯O and NH⋯F are between anions and cations.