Abstract
A new complex, [K(18-crown-6)(NO3)(HNO3)] (I), is synthesized, and its crystal structure is studied using X-ray diffraction analysis: space group P\( \bar 1 \) , a = 8.253 A, b = 9.277 A, c = 13.903 A, α = 95.89°, β = 104.30°, γ = 91.89°, Z = 2. The triclinic structure of compound I was solved by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.059 for all 3573 independent reflections (CAD4 automated diffractometer, γMoKα radiation). The structure of compound I contains two independent halves of two centrosymmetric complex molecules with different coordination modes of the K+ cations. Two NO3− and HNO3 ligands are randomly disordered relative to the symmetry center and are presented by two average independent H0.5N31/2−, ligands, which are also orientationally disordered.
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