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In this study, two compounds of triethylene glycol bistosylate (C 20 H 26 O 8 S 2 , I) and 1,8-bis(4-nitrophenoxy)-3,6-dioxaoctane (C 18 H 20 N 2 O 8 , II) were synthesized. Their structures were characterized by  1 H NMR,  13 C NMR, FT-IR, melting-point and elemental analysis, as well as X-ray single-crystal diffraction. The analyses of X-ray single crystal diffraction showed that the monomer of compound  I  was in sigmoid conformation due to the intramolecular C-H···π interaction, furthermore, a 3D network structure was constructed by five C-H···O hydrogen bonds. Unlike the compound  I , the compound  II  was linked by two C-H···O hydrogen bonds through nitro and aromatic rings to form a 2D network structure. Host-guest chemistry of compounds  II  and β-cyclodextrin was also investigated by  1 H NMR, FT-IR and UV-Vis spectra. The binding ratio of the compound  II  and  β -cyclodextrin was 1:2 and the association constant  K a was 5.31 × 10 4  L 2 ·mol −2  obtained by UV-Vis spectra.

Synthesis, characterization and crystal structure of two triethylene glycol derivatives