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# Complexation with diol host compounds. Part 33. Inclusion and separation of pyridines by a diol host compound

12/2000; 3(4):251-261. DOI: 10.1016/S1463-0184(00)00044-7

ABSTRACT The host 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol includes pyridine and the picolines. The structures of these inclusion compounds and their lattice energies have been determined. The selectivity of the host for a particular guest has been measured by competition experiments and the results are rationalised in terms of the structural features of the host-guest compounds.

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• ##### Article: Inclusion compounds of binaphthol with xylidines: structures, selectivity and kinetics of desolvation
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ABSTRACT: The inclusion compounds of binaphthol with three isomers of xylidine have been studied in terms of their structures and infra-red spectra. Competition experiments show that the selectivity of enclathration follows the trend: 2,6-xylidine > 2,3-xylidine ≈ 3,5-xylidine. The kinetics of desolvation have been analysed and the activation energies established.
Journal of the Chemical Society Perkin Transactions 2 01/2002; DOI:10.1039/b204190c
• ##### Article: Complexation with diol host compounds. Part 36: inclusion compounds of 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol with benzene, toluene and mesitylene
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ABSTRACT: The title compound 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol (H) forms inclusion compounds with benzene, toluene and mesitylene. HC6H6 (1) and H$$\frac{3}{4}$$C7H8 (2) crystallize in the triclinic space group P(-1) with unit cell dimensions for 1: a = 13.001(3) , b = 15.284(3) , c = 16.744(3) , α = 99.26(3), β = 74.78(3), γ = 64.96(3), Z = 4 and for 2: a = 12.922(3) , b = 15.159(3) , c = 16.562(3) , α = 68.12(3), β = 73.99(3), γ = 66.00(3), Z = 4. The hydroxyl groups of adjacent host molecules are involved in hydrogen bonding. HC9H12 (3) exhibits a different packing arrangement with weak hydrogen bonding between the hydroxyl hydrogen of the host and the phenyl ring of the guest. The crystal system of compound 3 is monoclinic with space group C2/c, a = 23.750(5) , b = 8.4746(17) , c = 17.760(4) , α = 90, β = 123.40(3), γ = 90, Z = 4. The thermal behaviour of these compounds has also been studied.
Journal of Chemical Crystallography 07/2006; 36(7):435-443. DOI:10.1007/s10870-005-9042-8 · 0.48 Impact Factor
• ##### Article: 1:2 and 2:1 Stoichiometric Inclusion Complexes of 1,1,6,6-Tetraphenylhexa-2,4-diyne-1,6-diol and p-Anisaldehyde
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ABSTRACT: Abstract 1:2 and 2:1 stoichiometric complexes of 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol (DD) and p-anisaldehyde were presented in this paper. 2:1 inclusion complex of DD with p-anisaldehyde (denote 1) was fortuitously obtained from the volatile oil of medicine herb Zanthoxylum schinifolium Sieb.et Zucc. 1:2 inclusion complex of DD with p-anisaldehyde (denote 2) was obtained under ordinary crystallization conditions. The results of single crystal X-ray diffraction show that complex 1 is triclinic, space group Pī, whereas the complex 2 is monoclinic, space group P21/n. In the complex of 1, 1D zigzag ribbon host framework is constructed through a closed hydrogen bonding network formed by DD molecules themselves and p-anisaldehyde molecules are accommodated into the tunnel enclosed by 1D zigzag ribbons. In the complex of 2, DD and p-anisaldehyde are connected with each other via hydrogen bonding, forming a layer-type structure. DD molecule exhibits gauche conformation in complex 1 and antiperiplanar conformation in complex 2, which are regarded as supramolecular conformation stereoisomers. Graphical Abstract 1:2 and 2:1 stoichiometric complexes (1 and 2) of 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol (DD) and p-anisaldehyde were presented in this study. DD molecule exhibits gauche conformation in complex 1 and antiperiplanar conformation in complex 2, which are regarded as supramolecular conformation stereoisomers.
Journal of Chemical Crystallography 11/2011; DOI:10.1007/s10870-011-0172-x · 0.48 Impact Factor