4,7,13,16,21,24-Hexaoxa-1,10-Diazoniabicyclo[8.8.8]hexacosane Pentaaqua[Bis(nitrato-O,O′)]yttrium(III) Dichloride Nitrate: Synthesis and Crystal Structure

Abstract

A complex salt, namely, 4,7,13,16,21,24-hexaoxa-1,10-diazoniabicyclo[8.8.8]hexacosane pentaaqua[bis(nitrato-O,O′)]yttrium(III) dichloride nitrate [Y(NO₃)₂(H₂O)₅]⁺[H₂(Crypt-222)]²⁺2Cl^–NO^– ₃ (I) was synthesized and structurally characterized by X-ray diffraction analysis (triclinic crystal system, space group P31с, a = 8.443(1) Å, c = 28.110(5) Å, Z = 2). The structure was solved by the direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.072 from 2000 measured reflections (CAD4 automated diffractometer, λCuK _α radiation). The crystal structure of I is highly disordered. All ions are located in crystallographic axes 3 and all but one Cl^– ion are disordered. In the [Y(NO₃)₂(H₂O)₅]⁺ complex cation, the coordination polyhedron of the Y atom (C.N. 9) is a distorted pentagonal bipyramid with two O atoms of two nitrato ligands as two bifurcate vertices and five O atoms of five water molecules as the base.