25,27-Bis(acryloyloxy)-26,28-dihydroxycalix[4]arene toluene hemisolvate

Abstract

Key indicators: single-crystal X-ray study; T = 297 K; mean (C-C) = 0.006 Å; R factor = 0.067; wR factor = 0.190; data-to-parameter ratio = 17.0.In the title compound, C 34 H 28 O 6 Á0.5C 7 H 8 , the calix[4]arene molecule forms a cone-like conformation, stabilized by intramolecular O-HÁ Á ÁO hydrogen bonds. In the crystal structure, the calixarene molecules form centrosymmetric dimers via aromaticinteractions [centroid separation = 3.633 (3) Å ]. The toluene solvent molecule is disordered about an inversion centre.

Synthesis, spectral characterisation and thermal behaviours of some new p-tert-butylcalix[4]arene and calix[4]arene-esters containing acryloyl groups

“…The other characteristic features coming at 1635-1593 cm À1 and 1306-1132 cm À1 are attributed to the ethenyl (CH 2 @CHA) and the aromatics AC@CA, AC(O) AOA and ArAO, respectively. These findings indicates that the synthesised compounds exist in calixareneesters forms as proved by studies in the literature [24,[25][26][27][28][29][30][31][32].…”

“…1) were given in Section 2. The characteristic stretches of the carbonyl groups of acryloyl moiety of the synthesised compounds were identified as a very strong singlet absorption at 1749-1732 cm À1 [24][25][26]. The OH group stretching vibration of p-tert-butylcalix [4]arene and calix [4]arene 1, 2 was observed at ca.…”

“…The related values can be seen in Table 2. These findings indicate that the compounds 3-10 exist in calixarene-ester forms [24][25][26][27][28][29][30][31][32].…”

“…The mono-, di-, tri-, and tetra-acryloyl esters of p-tert-butylcalix [4]arene and calix [4]arene compounds can be important in preparing calixarenes containing unsaturated groups in their molecules and undergo copolymerisation with different vinyl monomers ( Fig. 1) [23][24][25][26], their antioxidant properties and in other experiments.…”

“…The thermal behaviour of calix [4]areneesters having acryloyl groups have not been reported previously. We have previously reported the synthesis, characterisation and dyeing properties of the acryloyloxy derivatives of o,o 0 -dihydroxyazo [22] and hydroxazo [23] dyes that have polymerisable, and later of the crystal structures of the diacryloyloxy derivatives of p-tertbutylcalix [4]arene and calix [4]arene [24,25]. The mono-, di-, tri-, and tetra-acryloyl esters of p-tert-butylcalix [4]arene and calix [4]arene compounds can be important in preparing calixarenes containing unsaturated groups in their molecules and undergo copolymerisation with different vinyl monomers ( Fig.…”