作者:N. A. Budantseva、G. B. Andreev、A. M. Fedoseev、M. Yu. Antipin
DOI:10.1023/a:1025615828637
日期:——
New neptunium(VI) complex H3NCH2CH(NH3)CH3} [(NPO2)(2)(CrO4)(3)(H2O)] (.) 3H(2)O is synthesized; its crystal structure is determined and IR and near-IR absorption spectra are recorded. The crystallographic data are: a = 10.805(2) Angstrom, b = 11.238(2) Angstrom, c = 17.615(8) Angstrom, space group P2(1)2(1)2(1), Z = 4, V = 2139(1) Angstrom(3), R = 0.051, wR(F-2) = 0.109. The crystal structure of the compound is built of the anionic layers of [(NpO2)(2)(CrO4)(3)(H2O)](n)(2n-). The H3NCH2CH(NH3)CH3}(2+) cations and crystallization water molecules are arranged between the layers. Coordination polyhedron of two crystallographically independent Np atoms has the shape of a pentagonal bipyramid. The equatorial plane in one Np polyhedron is formed by the oxygen atoms of four chromate ions and water molecule and by the oxygen atoms of five chromate ions in the other one.