Crown Inclusion Compounds with 3,4-Diamino-1,2,5-Oxadiazole. X-Ray Structures of Its 1:1 Inclusion Complexes with 15-Crown-5 and Benzo-15-crown-5 |
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| Authors: | Roman Luboradzki Janusz Lipowski Yurii A. Simonov Marina S. Fonari Edward V. Ganin Arkadii A. Yavolovskii |
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| Affiliation: | (1) Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL, 01-224 Warszawa, Poland;(2) Institute of Applied Physics, Academy of Sciences of Moldova, MD, 2028, Academy str. 5, Chisinau, Moldova;(3) Physico-Chemical Institute of Environment and Human Protection, Odessa State University, Odessa, 27000, Ukraine |
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| Abstract: | The X-ray crystal structures of two closely related molecular complexes of 15-crown-5 and benzo-15-crown-5 with 3,4-diamino-1,2,5-oxadiazole are reported (I and II). Both complexes are of 1:1 stoichiometry with the host–guest alternation in the infinitechains formed due to the unsymmetrical H-bonding patterns between the components. Crystals of I are monoclinic, P21/c, a = 7.856(3), b = 12.994(1), c = 16.033(1)  ,  = 94.79(2)°, Z = 4, final R-factor is 0.0488. Crystals of II are orthorhombic, P212121, a = 8.260(4), b = 15.692(5),c = 13.955(7) , Z = 4, final R-factor is 0.0522. |
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| Keywords: | crystal structure host– guest complex 15-membered crown ethers unsymmetrical hydrogen bonding pattern |
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