A. N. Chekhlov

(18-Crown-6)potassium Tetrachloroferrate(III), Dibromodichloroferrate(III), and Tetrabromoferrate(III): Synthesis and Crystal Structures

AbstractThree new crystalline complexes are synthesized: [K(18-crown-6)]+ · An, where An = [FeCl4]−(I), [FeBr2Cl2]− (II), and [FeBr4]− (III). The crystals of compounds I–III are cubic and isomorphic, space group Fd

Synthesis and crystal structure of (2.2.2-cryptand)(nitrato-O,O’)lead(II) nitrate monohydrate

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Synthesis and crystal structure of diaqua(2.2.2-cryptand)lead(II) bis( N -thiobenzoyldiisopropylthiophosphoramidate)

(Z = 16): a = 20.770(2) Å for I, 20.844(3) Å for II, and 20.878(4) Å for III. Structures I–III are solved by a direct method and refined by the full-matrix least-squares method in the anisotropic approximation to R = 0.047 (I), 0.059 (II), and 0.098 (III) for all 680 (I), 684 (II), and 686 (III) independent reflections. In two tetrahedral anions [Fe(1)X4]− and [Fe(2)X4]− in structures I–III, all halogen atoms (X = Cl and Br) are randomly disordered over three close positions relative to the crystallographic axes 3. Structures I–III contain the [K(18-crown-6)]+ host-quest complex cation. The K+ cation (CN = 8) resides in the cavity of the 18-crown-6 ligand and coordinated by its six O atoms and two disordered halogen X atoms. The coordination polyhedron of the K+ cation in complexes I–III is a distorted hexagonal bipyramid.

(18-Crown-6)sodium tribromide and (18-crown-6)potassium triiodide (with an admixture of bromodiiodide): Synthesis and crystal structure

AbstractA 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

Synthesis and Crystal Structure of Dibenzo-18-Crown-6 Oxonium Perchlorate

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Synthesis and crystal structure (1,10-diaza-18-crown-6-N,N′,O,O′)dichloromanganese(II)

, a = 8.253 Å, b = 9.277 Å, c = 13.903 Å, 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.