Crystal and molecular structures ofp-(1,1,3,3-tetramethylbutyl)calix[5]arene and its 1 : 1 complex with toluene |
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Authors: | Monique Perrin Sylvain Lecocq |
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Institution: | (1) Laboratoire de Mineralogie-Cristallographie, associé.au C.N.R.S., URA 805, Université Claude Bernard LYON I, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France |
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Abstract: | A cyclic pentamer was obtained fromp-(1,1,3,3-tetramethylbutyl) phenol. It crystallizes from a mixture of acetone and toluene at room temperature giving a 1 : 1 complex with toluene (compound A), whereas at 50°C the empty form (compound B) is obtained. Crystals of A are orthorhombic, space groupPna21,a = 20.083(2),b = 12.936(6),c = 28,423(1) Å,Z = 4, finalR value = 0.067. The empty form, B, is monoclinicP21/c,a = 18.695(2),b = 11.673(5),c = 35.100(4) Å, = 114.33(1),Z = 4, finalR value = 0.135. The macrocycle is in the cone conformation for both compounds; the toluene molecule lies in the cone as often found for calix4]arenes. |
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Keywords: | Calixarene inclusion compounds crystal structure |
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