[Ba(benzo-15-crown-5)₂](I₃)₂ and [Ba(benzo-15-crown-5)₂](I₇)₂ can be obtained in crystalline form by reacting benzo-15-crown-5 (C₁₄H₂₀O₅), barium iodide (BaI₂), and iodine (I₂) in ethan-ole /dichloromethane. The triiodide consists of a sandwich-like cation [Ba(benzo-15-crown-5)₂]²⁺ and an isolated symmetrically linear I₃^- anion. The unusual I₇^- anion in the heptaiodide can be described as a V-shaped pentaiodide unit, which is connected with a slightly widened iodine molecule to the rare Z-form of the heptaiodide ion. In the crystal structure, secondary bonding distances lead to almost planar ten-membered iodine rings, which are connected by common edges to form staircase-like bands.

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Volume628, Issue2

February 2002

Pages 383-388

[Ba(Benzo-15-Krone-5)₂](I_n)₂: Darstellung und strukturelle Charakterisierung eines Triiodids (n = 3) und eines Heptaiodids (n = 7)

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[Ba(Benzo-15-Krone-5)2](In)2: Darstellung und strukturelle Charakterisierung eines Triiodids (n = 3) und eines Heptaiodids (n = 7)

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[Ba(Benzo-15-Krone-5)₂](I_n)₂: Darstellung und strukturelle Charakterisierung eines Triiodids (n = 3) und eines Heptaiodids (n = 7)