ISSN:
1063-7745
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The structure of the [(DCH-6A ⋅ NH4)(H2O)I]2 complex obtained by the reaction between the cis-syn-cisisomer of dicyclohexano-18-crown-6 (DCH-6A) and NH4I has been determined by X-ray diffraction analysis. The crystals are triclinic, a = 9.314(3) Å, b = 11.951(2) Å, c = 12.040(1) Å, α = 77.36(1)°, β = 81.59(1)°, γ = 80.41(2)°, space group $$P\bar 1$$ , Z = 2, and the final R factor is 0.044. The structure is built up of the (DCH-6A ⋅ NH4) + cationic complexes, iodide anions, and water molecules. The ammonium ion forms three hydrogen bonds of the NH⋯O type [N⋯O, 2.881(5)–2.890(5) Å] with the oxygen atoms of the crown ether molecule. The organic cations are joined together into centrosymmetric dimers through the system of hydrogen bonds of the NH⋯OH type. The I−⋯O distances (where the O atom belongs to the bridging water molecule) fall in the range 3.558(4)–3.610(4) Å.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.171139
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