Synthesis and the Crystal Structure of Aqua-Dioxo-Nitrato-(2,2',6',2'-Terpyridine)-Neptunium(V) [NpO_2(NO_3)(Terpy)(H_2O)]

摘要

The crystal structure of the [NpO_2(NO_3)(Terpy)(H_2O)] complex between pentavalent neptunium and 2,2',6',2"-terpyridine is determined. The crystal data are as follows: a = 11.130(3) A, b = 7.916(2) A, c = 18.324(5) A, β = 100.873(6)°. V = 15.85(8) A~3, Z = 4, space group is P2_1, R = 0.044, and wR(F~2) = 0.092. The coordination polyhedron of the Np atom is a pentagonal bipyramid whose equatorial plane includes three nitrogen atoms of the Terpy molecule and two oxygen atoms of the nitrate ion and the water molecule.