Stabilization of a Host-Guest Type Complex by Bifurcated Hydrogen Bonds : 18-crown-6 · (2,4-Dinitrophenylhydrazine)2a
1981 ◽
Vol 36
(2)
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pp. 242-247
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Keyword(s):
X Ray
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Abstract The X-ray structure of the 1:2 host-guest complex between 1,4,7,10,13,16-hexaoxa-cyclooctadecane (18-crown-6) and 2,4-dinitrophenylhydrazine is reported. Crystallo-graphy data are: space group P21/c, a = 8.557(2), b = 16.745(6), c = 12.387(4) Å, β = 117.08(13)°, Z = 2, Dm = 1.37 g · cm-3 , Dc = 1.387 g · cm-3 , m.p. 414 K (decomp.). The present B is 0.11 for 1733 diffractometer data. In the complex, the two 2,4-dinitrophenylhydrazine molecules are located "above" and "below" the plane of the hexaether and related by an inversion centre. They interact with the macrocyclic host via N-H···0 hydrogen bonds, two of which are bifurcated. All the ether oxygens of the crown serve as hydrogen bond acceptors.
2013 ◽
Vol 68
(3)
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pp. 214-222
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2001 ◽
Vol 58
(1)
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pp. 94-108
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Keyword(s):
2005 ◽
Vol 60
(9)
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pp. 978-983
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2018 ◽
Vol 74
(4)
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pp. 406-410
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Keyword(s):
1996 ◽
Vol 52
(2)
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pp. 323-327
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2019 ◽
Vol 75
(6)
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pp. 880-887
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2002 ◽
Vol 57
(8)
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pp. 914-921
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