Self-Organization of 𝐊⁺-Crown Ether Derivatives into Double-Columnar Arrays Controlled by Supramolecular Isomers of Hydrogen-Bonded Anionic Biimidazolate Ni Complexes

Figure 5

Views of honeycomb-sheet structures for crystals 1–5 are represented. Three sheet structures of crystals 1, 3, and 4 ((a), (c), and (d)) are constructed from alternating H-bonded connections with the ΔΛ−ΔΛ−ΔΛ sequence. In contrast, crystals 2 and 5 ((b) and (e)) are constructed from hydrogen-bonding connections with the ΔΔΔ−ΛΛΛ sequence between the two infinite ΔΔΔ⋯ and ΛΛΛ⋯ zigzag chains. The Δ and Λ isomers of [Ni(Hbim)₃]⁻ are represented by red and blue lines, respectively. The crown ether frameworks and MeOH molecules are shown in green. The potassium and nickel (II) ions are drawn as yellow and magenta spheres, respectively.

(a)

(b)

(c)

(d)

(e)