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Hydrogen-Bonded Urea-Anion Host Lattices. Part 4. Comparative Study of Inclusion Compounds of Urea with Tetraethylammonium and Tetraethylphosphonium Chlorides

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Abstract

New inclusion complexes (C2H5)4E+Cl-⋅2(NH2)2CO(1, E = N; 2, E = P) have beenprepared and characterized by X-ray crystallography. Crystal data, MoKα radiation: 1, space group P21/c,Z = 4, a = 10.492(6), b = 14.954(8), c = 10.335(6) Å, β = 91.02(5)°, R F = 0.050 for 1527 observed data; 2, space group Pmn21, Z = 2, a = 7.446(1), b = 9.200(2), c = 12.753(3) Å, R F = 0.079 for 519 observed data. In compound 1 the tetraethylammonium ions are sandwiched between puckered layers, which are constructed from the linkage of chloride ions and wide urea ribbons each composed of a broadside arrangement of centrosymmetric hydrogen-bonded urea dimers. In the crystal structure of 2, hydrogen-bonded urea ribbons running parallel to [100] are connected by chloride ions to generate a sawtooth wave layer, and stacked columns of tetraethylphosphonium cations are sandwiched between adjacent layers.

Supplementary Data relating to this article have been deposited with the British Library as Supplementary Publication No. SUP 82216 (11 pages).

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  1. Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong

    QI LI & THOMAS C. W. MAK

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  1. QI LI
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LI, Q., MAK, T.C.W. Hydrogen-Bonded Urea-Anion Host Lattices. Part 4. Comparative Study of Inclusion Compounds of Urea with Tetraethylammonium and Tetraethylphosphonium Chlorides. Journal of Inclusion Phenomena 28, 151–161 (1997). https://doi.org/10.1023/A:1007985329632

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