Self-inclusion

Compound 15 has an ill-defined structure 70) due to poor crystal quality. It is, however, interesting to note that 15 became resolved (space group 7 2,2, Z = 8) in an attempted cocrystallization experiment in the presence of optically pure 1. The two molecules of 15 in the asymmetric unit may be seen as a sort of a self inclusion , where molecules are again linked into infinite H-bond chains analogous to 13. 

Reinhout et al. prepared a (3-CD-calix[4]arene couple 64 in which a dansyl unit is attached to calix[4]arene and oriented toward the secondary face of (3-CD [56], This compound exhibits a fluorescence peak at 538 nm, and its intensity was hardly influenced by guest molecules. The examination of molecular models suggested a very strong self-inclusion of the dansyl group into the CD cavity. 

P= 103.3, r= 90.492 Inclusion/intercalation Self inclusion and intercalation Self inclusion and n stacking Inclusion and H-bonding H-Bonding, secondary coordination... 

Figure 15.28 X-ray crystal structure of [Ir(r 2-C60)(CO)Cl(15.6)2] showing self-inclusion.47...

Two calix[4](diseleno)crown ethers were synthesized by the treatment of the disodium salt of 1,3-propanediselanol with preorganized 1,3-dibromoethoxycalixarenes the 1,3-Se-bridged calixarene forms an infinite sheet aggregate by means of self-inclusion and intermolecular Se—Se interactions in the solid state <02TL131>. 

Figure 4 Schematic representations of the formation of 1-D inclusion networks based on koiland, building block possessing two divergent cavities, and connector molecules (a, d, e-h) or through self-inclusion by self complementary koilands (b, c, i-1). For definition, see text.

Figure 12 Structures of discrete tetranuclear inclusion self-inclusion complexes formed by noncentrosymmetric koilands 17 with EtOH (a) and 21 with THF (b). For the sake of clarity, hydrogen atoms are not represented.

Rather unpredictably, when the koiland 11 was crystallised in the absence of hexadiyne 33 but in the presence of a mixture of benzene and 2-propanol as the crystallising mixture, a 2-D self-inclusion koilate was obtained (Figure 16). The 2-D inclusion network is formed through inclusion of two ethyl groups belonging to two consecutive koiland 11 by each face of the koiland [78]. 

The formation of directional 1-D koilates based on self-inclusion was also investigated. The self-complementary koiland 16 based on the double fusion of the calix derivatives 1 and 2 by two Si atoms was found to generate a selfinclusion network (Figure 21). However, the koilate formed was not directional because the self-inclusion processes, leading to the formation of the network, take... 

Cup-and-ball CDs were synthesized by the introduction of a voluminous group such as the tm-butyl group which is linked to the end of the aliphatic chain in order to prevent self-inclusion of the pendant group [49,50]. 

Dodziuk, H., Chmurski, K., Jurczak, J., Kozmiaski, W., Lukin, O., Sitkowski, J., and Ste-faniak, J. (2000), A dynamic NMR study of self-inclusion of a pendant group in amphiphilic 6-thiophenyl-6-deoxycyclodextrins, J Mol. Struct., 519, 33-36. 

Fig. 10a-f Examples of the structural motifs of p-ferf-butylcalix[4] arene derivatives a guest-free structure b 1 1 complex c 2 1 host-guest complex d hydrogen-bonded structure with an amine guest e self-inclusion structure f 1 1 host-guest clay mimic structure. (Adopted from [44] with permission)... 

Berthault and Birlirakis by the use of vicinal proton-proton couplings. In particular, a formation of a stable self-inclusion complex accompanied by a local structural modification of the substituted altrose ring has been observed by the authors. 

A modified cyclodextrin with a fully encapsulated dansyl group self inclusion in the solid state and in solution, R. Corradini, A. Dossena, R. Marchelli, A. Panagia, G. Sartor, M. Saviano, A. Lombardi and V. Pavone, Chem. Eur. J., 1996, 2, 373. 

A novel [60]fullerene-calixarene conjugate which facilitates self-inclusion of the [60]fullerene moiety into the homooxacalix[3]arene cavity, A. Ikeda, S. Nobukuni, H. Udzu, Z. L. Zhong and S. Shinkai, Eur. J. Org. Chem., 2000, 3287. 

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