It is well known that the thiophenic
sulfur compound has two lone pairs of electrons on the sulfur atom: one pair lies on the six-electron [pi] system and the other lies in the plane of the ring.
 Iwasa, N., Kubota, T., Bando, K.K., Shirai, M.: "Hydrodesulfurization of thiophenic
compounds over synthetic smectite-type clays".
1H NMR (250 MHz, DMSO-d6, Me4Si, 8, ppm): 7.87 (dd, 1H, J = 8.0 and 1.5 Hz, H-8), 7.78 (br s, 2H, NH2); 7.36 (ddd, [sup.1]H, J = 8.0, 7.4 and 1.8 Hz, H-6), 7.22-7.17 (m, 2H, H-7 and H-5), 6.89 (s, 1H, thiophenic
compound removal, advanced oxidation processes, which begin with oxygen radicals, may take 3 forms: chemical, bio-, and photooxidation [8-10].
Articaine is considered an amide and safe local anesthetic with a specific characteristic in its structure that includes a substitute of the aromatic ring with a thiophenic
ring which gives it multiple clinical advantages, including the lipo-solubility of the drug, its superior diffusion through bony tissue as well as its duration of action (1.5 times >that of lidocaine) and only surpassed by ultra-long acting anesthetics such as ropivacaine and bupivacaine.
In this method thiophenic
sulfur compound alkylated with olefins in the presence of acidic catalyst as a result molar mass and boiling point of thiophenic
sulfur compound becomes increase which is easily disparate from the hydrocarbon stream in the distillating chamber .
Hafner, "A periodic density functional theory study of thiophenic
derivative cracking catalyzed by mordenite," Journal of Catalysis, vol.
Song, "Liquid-phase adsorption of multi-ring thiophenic
sulfur compounds on carbon materials with different surface properties," The Journal of Physical Chemistry B, vol.
Preparation of MCM41 supported phosphoric acid catalyst for thiophenic
compounds alkylation in FCC gasoline, Catalysis Communications., 11: 705709.
Sulfur is present in coal in organic phase (classified as aliphatic, aromatic, and thiophenic
sulfur) and inorganic phase, being pyrite (Fe[S.sub.2]) and sulphates 42].
Therefore, the better DBT removal ability of [BMIM]Cl expected to be recognized to enhance [pi]-[pi] interactions, because moreover the cations, the (-C=N) group in the [BMIM]Cl anions may also interact with the thiophenic
ring of DBT through [pi]-[pi] interaction [28, 29].
Deep desulphurization involves the separation of sulfur related thiophenic