Reference

Reactions of thiophene and methylthiophenes in the interlayer of transition-metal ion-exchanged montmorillonite studied by resonance Raman spectroscopy

Reactions of thiophene and methylthiophenes in the interlayer of transition-metal ion-exchanged montmorillonite studied by resonance Raman spectroscopy.Some chemicals with cas registry numbers like 69402-28-4 and 80029-99-8 are also used. Soma, Yuko; Soma, Mitsuyuki; Furukawa, Yukio; Harada, Issei (Natl. Inst. Environ. Stud., Tsukuba 305, Japan). Clays Clay Miner., 35(1), 53-9 (English) 1987. CODEN: CLCMAB. ISSN: 0009-8604. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 67, 73 The adsorption and reaction of thiophene [110-02-1] and methylthiophenes in the interlayer of Cu2+- and Fe3+-montmorillonites were investigated by resonance Raman spectroscopy. Thiophene and 3-methylthiophene [616-44-4] polymd. to form cations of polythiophene [25233-34-5] and polymethylthiophene [84928-92-7] resp., which were characterized by absorption bands in the near-IR region. These polymer cations formed in the interlayer were reduced to their neutral polymers if the clay-polymer complexes were in contact with water, and the formation of their neutral polymers was clearly demonstrated by their resonance Raman spectra. 2,5-Dimethylthiophene [638-02-8] in which polymn. was hindered by Me substitution at the 2 and 5 positions were oxidized to 2,5-dimethylthiophene cation in the interlayer. .

Thermal cracking of heterocyclic sulfur compounds

Thermal cracking of heterocyclic sulfur compounds. Braekman-Danheux, C.; Bettens, B.; Hermans, C. (Serv. Chim. Gen. Carbochim., Univ. Libre Bruxelles, Brussels, Belg.). Comm. Eur. Communities, [Rep.] EUR, EUR 9118, Round Table Meet. Chem. Phys. Valorization Coal, 7-33 (French) 1984. CODEN: CECED9. DOCUMENT TYPE: Report CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) The pyrolysis of thiophene [110-02-1], 3-methylthiophene [616-44-4], and benzothiophene [95-15-8], 14C-labeled, was studied as model S compds. present in the products from coal liquefaction. The overall result was that these model compds. undergo complex reactions and are converted to more thermodynamically stable S compds. There was very little fragmentation to low mol. S compds. (e.g., H2S). Thus, most org. S present in coal will appears in the coal liqs.