Hydrogen-bonded urea-anion host lattices .2. Crystal structures of inclusion compounds of urea with tetraalkylammonium bicarbonates
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AbstractNew inclusion complexes (C2H5)4N(+)HCO(3)(-).(NH2)(2)CO . 2H(2)O (1) and (n-C4H9)(4)N+HCO3-. 3(NH2)(2)CO (2) have been prepared and characterized by X-ray crystallography. Crystal data, MoKalpha radiation: 1, space group P2(1)/n, Z = 8, a = 9.356(1), b = 29.156(4), c = 12.161(1) Angstrom, beta = 90.03(1)degrees, R(F) = 0.062 for 2214 observed data; 2, space group , Z = 2, a = 8.404(2), b = 12.352(2), c = 14.377(4)Angstrom, a = 88.20(2), beta = 89.56(2), gamma = 71.68(1)degrees, R(F) = 0.052 for 3092 observed data. In both compounds the tetraalkylammonium ions are sandwiched between puckered layers, which are constructed from [((NH2)2CO)(2)(HCO3-)(2)](infinity), ribbons, each composed of centrosymmetric hydrogen-bonded urea dimers and bicarbonate dimers, by lateral linkage through water molecules in 1, and by direct cross-linkage of an alternate, parallel arrangement of the urea/bicarbonate and complementary urea ribbons in 2.
All Author(s) ListLi Q, Yip WH, Mak TCW
Journal nameJournal of Inclusion Phenomena and Macrocyclic Chemistry
Volume Number23
Issue Number3
Pages233 - 244
LanguagesEnglish-United Kingdom
Keywordsbicarbonate; hydrogen bonding; inclusion compound; tetraalkylammonium ion; urea
Web of Science Subject CategoriesChemistry; Chemistry, Multidisciplinary; Crystallography

Last updated on 2020-31-05 at 02:58