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Jablonec nad Nisou District is divided into three administrative districts of municipalities with extended competence: Jablonec nad Nisou, Tanvald and Železný Brod.In addition, two municipalities (Jenišovice and Malá Skála) belong to the administrative district of Turnov, which is the only such administrative district in the country whose borders do not correspond to the borders of the ...
Jablonec nad Nisou as viewed across the Mšeno Reservoir. Jablonec nad Nisou is located about 7 km (4 mi) southeast of Liberec and 83 km (52 mi) northeast of Prague. Most of the built-up area lies in the eastern tip of the Zittau Basin, and it is surrounded with the Jizera Mountains in the north, east and south. The northern part of the ...
Many syntheses have been developed. One popular route entails reduction of benzoin using zinc amalgam. [6]C 6 H 5 –CH(OH)–C(=O)–C 6 H 5, trans-C 6 H 5 –CH=CH–C 6 H 5. Both isomers of stilbene can be produced by decarboxylation of α-phenylcinnamic acid, trans-stilbene being produced from the (Z)-isomer of the acid.
Jablonec nad Nisou: First mentioned: 1538: Area • Total. 2.43 km 2 (0.94 sq mi) Elevation. 568 m (1,864 ft) Population
Benzil (i.e. Bz 2, systematically known as 1,2-diphenylethane-1,2-dione) is the organic compound with the formula (C 6 H 5 CO) 2, generally abbreviated (PhCO) 2. This yellow solid is one of the most common diketones .
Reaction of Ph 2 C 2 with benzal chloride in the presence of potassium t-butoxide affords 3-tert-butoxy-1,2,3-triphenylcyclopropene, which converts to 1,2,3-triphenylcyclopropenium bromide after the elimination of tert-butoxide. [6]
1,1-Diphenylethylene mediates the radical polymerization of methyl acrylate or styrene. Mediation by 1,1-Diphenylethylene generates low molecular weight polymer by a termination reaction. [ 3 ] Additionally, because 1,1-Diphenylethylene has a lower pKa than styrene, it is an effective mediator in the anionic living polymerization of styrene ...
(Z)-Stilbene is sterically hindered and less stable because the steric interactions force the aromatic rings 43° out-of-plane and prevent conjugation. [2] Z )-Stilbene has a melting point of 5–6 °C (41–43 °F), while ( E )-stilbene melts around 125 °C (257 °F), illustrating that the two compounds are quite different.