Crystallographic and NMR analysis of 9-phenylthiophenanthrene and 9-tert-butylthiophenanthrene
The crystal structures of 9-phenylthiophenanthrene (C20H14S) and 9-tert-butylthiophenanthrene (C18H18S) were determined at 193 K. The former crystallizes in orthorhombic space group P21212
A semiconducting supramolecular Co(ii)-metallohydrogel: an efficient catalyst for single-pot aryl-S bond formation at room temperature
A novel mechanically stable supramolecular Co(ii)-metallohydrogel has been synthesized. Cobalt(ii) nitrate hexahydrate and monoethanolamine, as a low molecular weight organic gelator, are used to get the gel. The mechanical stability of the supramolecular hydrogel was analyzed. The morphology of the supramolecular metallohydrogel was scrutinized. The semiconducting features of the metallohydrogel were studied. The conducting properties of the Co(ii)-metallohydrogel establish a Schottky barrier diode type nature. The catalytic nature of the Co(ii)-metallohydrogel based room temperature single pot aryl-S coupling reaction was explored. Most interestingly, the Co(ii)-metallohydrogel based catalytic aryl-S coupling reaction does not require any column-chromatographic purification protocol to get pure aryl-thioethers. Thus, through this work a semiconducting Schottky barrier diode application and catalytic role in the room temperature single pot aryl-S coupling reaction of a supramolecular Co(ii)-metallohydrogel have been explored.
Microwave-assisted synthesis of substituted phenanthrenes, anthracenes, acenaphthenes, and fluorenes
Rapid coupling reactions of polycyclic aromatic halides with various N-, S-, and Se-nucleophiles under focused microwave irradiation are described. Using this method, the desired products are obtained with good to excellent yields in a short reaction time. Crown Copyright
Chan, Shiuh-Chuan,Jang, Jing-Pei,Cherng, Yie-Jia
experimental part
p. 1977 - 1981
(2009/08/08)
Cobalt-catalyzed aryl-sulfur bond formation
A new cobalt-catalyzed coupling of aryl halides with thiophenols and alkanethiols is reported. A variety of aryl sulfides can be prepared in excellent yields under mild reaction conditions using 1-2 mol % of Col2(dppe) and Zn. This new cobalt-catalyzed coupling represents an interesting addition to previously known methods to synthesize thioethers.
Sur le comportement cathodique inattendu des di-aryl sulfoxydes en solvant de tres faible acidite
When conducted in aprotic solvents the cathodic reduction of aromatic sulphoxides (only able to lead to an electron transfer under such conditions) does not afford the quantitative formation of the corresponding sulphides.On the contrary, one observes the conversion into a mixture sulphide/sulphone in a molar ratio 1/1 followed in most of the cases by the cathodic cleavage of the sulphone.Reasons for such a are analysed.
Djeghidjegh, Nouredine,Simonet, Jacques
p. 39 - 41
(2007/10/02)
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