Aprotic lattice inclusions involving bulky cyclopropano hosts. Crystal structures of inclusion compounds with nitromethane and toluene
| Autor: | Edwin Weber, Ingeborg Csöregh, Andreas Wierig, Olga Gallardo, Manfred Hecker |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Supramolecular Chemistry. 3:319-325 |
| ISSN: | 1029-0478 1061-0278 |
| DOI: | 10.1080/10610279408034931 |
| Popis: | The crystal structures of the inclusion compounds between trans-2,3-dibenzoyl-1,1-diphenylcyclopropane (1) and nitromethane, 1·MeNO2 (1:1) (1a), and between trans-2,3-dibenzoylspiro[cyclopropane-1,9′-fluorene] (2) and toluene, 2·toluene (1:1) (2a), have been studied by X-ray diffraction. Crystals of 1a show monoclinic symmetry (P21/n) with a = 12.9074(8), b = 11.0327(6), c = 17.6178(10) A, β = 98.739(8)°, Z = 4 and Dc = 1.2416(1) g cm−3; final R = 0.050 for 3121 reflections collected at T = 291(1) K. Crystals of 2a are monoclinic (A2/c) with a = 17.3805(7), b = 8.4322(3), c = 18.8641(7) A, β = 95.596(3)°, Z = 4 and Dc = 1.1892(1) g cm−3; final R = 0.057 for 1895 observations collected at T = 173(1) K. In the absence of hydrogen bonds, the molecular packing is governed by rather weak electrostatic intermolecular forces in both crystals, but in different ways. The co-crystals of 1a are held together by dipole-dipole and C(H)…O interactions involving the polar groups of both host and guest, whereas ... |
| Databáze: | OpenAIRE |
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