Two triethylammonium ion complexes of monoanionic calix[4]arene |
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Authors: | Pierre Thu ry,Zouhair Asfari,Martine Nierlich,Jacques Vicens |
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Affiliation: | Pierre Thuéry,Zouhair Asfari,Martine Nierlich,Jacques Vicens |
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Abstract: | Two complexes between mono‐deprotonated calix[4]arene and Et3HN+ are reported. The first, triethylammonium 26,27,28‐trihydroxypentacyclo[19.3.1.13,7.19,13.115,19]octacosa‐1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23‐dodecaen‐25‐olate, C6H16N+·C28H23O4?, comprises only the cationic and anionic species, whereas the second, tris(triethylammonium) tris[26,27,28‐trihydroxypentacyclo[19.3.1.13,7.19,13.115,19]octacosa‐1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23‐dodecaen‐25‐olate] acetonitrile solvate, 3C6H16N+·3C28H23O4?·C2H3N, comprises one acetonitrile solvent molecule for three such units. In both cases, the units are stacked in columns so that the ammonium cation is hydrogen bonded to a phenolic or phenolate O atom of one molecule and included in the hydrophobic cavity of another neighbouring calixarene. The short contacts present indicate that cation?π and C—H?π interactions are likely to be involved in the inclusion phenomena. |
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