Synthesis and the Crystal Structure of Aqua-Dioxo-Nitrato-(2,2',6',2''-Terpyridine)-Neptunium(V)[NpO$_2$(NO$_3$)(Terpy)(H$_2$O)]

Abstract

RADIOCHThe crystal structure of the [NpO2(NO3)(Terpy)(H2O)] complex between pentavalent neptunium and 2,2,6,2-terpyridine is determined. The crystal data are as follows: a = 11.130(3) Å, b = 7.916(2) Å, c = 18.324(5) Å, = 100.873(6)°, V = 1585.5(8) Å3 , Z = 4, space group is P21/n, R = 0.044, and wR(F2) = 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 molecul