Results 241 to 250 of about 11,071 (289)

Thiophene

2000
Abstract Thiophene can be found in peat, coal tar and gas, and technical grades of benzene. It has similar physical properties to benzene and may be used as a solvent. Thiophene is used to manufacture resins with phenol and formaldehyde, dyes, and pharmaceuticals, including dopamine-uptake antagonists and anticonvulsants.
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Electronic spectrum of thiophen and some deuterated thiophens

Journal of the Chemical Society, Faraday Transactions 2, 1972
The electronic absorption spectra of thiophen and of some deuterated thiophens have been studied in the range 2500–1400 A. Three electronic transitions, with origins at 41 595, 48 330 and 53 270 cm–1 in C4H4S and two Rydberg series leading to the limit 71 570 cm–1 were analyzed.
G. Di Lonardo, G. Galloni, A. Trombetti, C. Zauli   +3 more
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Radiation-Driven Destruction of Thiophene and Methyl-Substituted Thiophenes

Astrobiology
Thiophene and two derivatives (2-methylthiophene and 3-methylthiophene) have been detected on the surface of Mars with the Sample Analysis at Mars instrument suite onboard NASA’s Curiosity rover. Thiophene could serve as a secondary chemical biosignature since the secondary biosynthesis of thiophene is considered an important production pathway ...
Patrick D. Tribbett, Yukiko Y. Yarnall, Reggie L. Hudson, Perry A. Gerakines, Christopher K. Materese   +4 more
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Condensations of Thiophene with Ketones.

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Brian J. Morrison, Oliver C. Musgrave
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9.10.4 Thiophenes, Thiophene 1,1-Dioxides, and Thiophene 1-Oxides (Update 2011)

2011
Abstract This manuscript is an update to the earlier Science of Synthesis contribution describing methods for the synthesis of thiophenes. The main focus lies on modern synthetic transformations, such as transition-metal-mediated coupling reactions, leading to functionalized thiophenes.
J. Schatz, M. Seßler
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Kinetics of the desulfurization of thiophene: Reactions of thiophene and butene

Journal of Catalysis, 1977
Abstract The kinetics of the desulfurization of thiophene on a representative CoOMoO 3 Al 2 O 3 were studied in the temperature range of 250–313 °C for partial pressures of thiophene from 20 to 160 Torr and for partial pressures of hydrogen from 550–750 Torr.
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The Versatile Thiophene: An Overview of Recent Research on Thiophene‐Based Materials

Advanced Materials, 2005
AbstractIn the last few years, thiophene‐based materials, which are semiconductor and fluorescent compounds, have become a highly interdisciplinary field of research, with diverse studies ranging from the fabrication of electronic and optoelectronic devices to the selective detection of biopolymers.
G Barbarella, M Melucci, G Sotgiu
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Thiophene chemistry—XX

Tetrahedron, 1970
E.B. Pedersen, S.-O. Lawesson
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Thiophen

Fresenius' Zeitschrift f�r Analytische Chemie, 1955
H. Freytag, Irmgard Schweitzer, J. Rasch
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Chapter 5 Thiophenes and benzo[b]thiophenes

2007
Publisher Summary Thiophene is a useful template for four-carbon homologation via reduction, as well as a bioisostere of the benzene ring and other heterocycles in medicinal chemistry. Thiophene is a π-electron-excessive heterocycle. It favors electrophilic substitution, which, similar to metalation, takes place preferably at the α-positions due to
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