Citation: XIONG Jing, CAI Xiao-Qing, YIN Ping, HU Mao-Lin. Crystal Structure, Spectroscopic and Thermal Properties of 2-(toluene-4-sulfonylamino)-benzoic Acid[J]. Acta Physico-Chimica Sinica, ;2007, 23(08): 1183-1188. doi: 10.1016/S1872-1508(07)60063-1
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The structure of 2-(toluene-4-sulfonylamino)-benzoic acid (I) derived from X-ray diffraction of a single crystal was presented and verified by using FT-IR, NMR, and elemental analyses. The compound was crystallized in the monoclinic space group C2/c. The lattice parameters are, a=2.7320(3) nm, b=0.85441(8) nm, c=1.17607(11) nm, α=90°, β=98.728(3)°, γ=90°, V=2.7135(5) nm3, and Z=8. The unimolecules in compound I are engaged in N—H…O and O—H…O hydrogen bonds leading to centrosymmetric dimers, which are interlocked through two distinctly different types of C—H…Ohydrogen bonds and face-to-face π…π interactions resulting in an intriguing supramolecular structure. The compound I exhibited solvatochromism as evidenced from UV-Vis study in different solvent media. Moreover, fluorescence spectra and thermal analysis (DSC-TGA) indicated that the compound I was a photochromic and heatproof material.
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