Actinide coordination chemistry - a unique example of a homoleptic complex of nine-coordinate thorium(IV)
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The dimethylsulfoxide (dmso) solvate of Th(IV) perchlorate is readily obtained from acidic aqueous Th(IV) solutions and has a formulation established from a single crystal structure determination of [Th(dmso-O)9](ClO4)4 . 4dmso; triclinic, P1, a = 12:4811(8)A, b = 12:4879(8)A, c = 23:969(2)A, a = 94:684(1), b = 95:823(1), y = 119:347(1). The primary coordination sphere of the Th is of tricapped trigonal prismatic form, with the symmetry of the [Th(dmso-O)9] entity being close to C3h.
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