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
Year1995
Month1
Day1
Volume Number23
Issue Number3
PublisherKLUWER ACADEMIC PUBL
Pages233 - 244
ISSN0923-0750
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