ISSN:
1573-1111
Keywords:
Urea
;
tetraalkylammonium ion
;
bicarbonate
;
hydrogen bonding
;
inclusion compound
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract New inclusion complexes (C2H5)4N+HCO 3 − ·(NH2)2CO·2H2O (1) and (n-C4H9)4N+HCO 3 − ·3(NH2)2CO (2) have been prepared and characterized by X-ray crystallography. Crystal data, MoK α radiation:1, space groupP21/n,Z=8,a=9.356(1),b=29.156(4),c=12.161(1) Å, β=90.03(1)°,R F =0.062 for 2214 observed data;2, space groupPī,Z=2,a=8.404(2),b=12.352(2),c=14.377(4) Å,a=88.20(2), β=89.56(2), γ=71.68(1)°,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(HCO 3 − )2]∞, ribbons, each composed of centrosymmetric hydrogen-bonded urea dimers and bicarbonate dimers, by lateral linkage through water molecules in1, and by direct cross-linkage of an alternate, parallel arrangement of the urea/bicarbonate and complementary urea ribbons in2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00709581
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