Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Faraday, Michae

Viologen (4,4 -dipyridyl dihydrochloride) p7926-72-3] M 229.1, m 278" (also reported m 302-306", >300", with sublimation), pKi 3.17, pK2 4.82. Purify viologen by precipitation on adding excess of acetone to a concentrated solution of it in aqueous MeOH. It has also been recrystallised several times from MeOH or /5o-propanol and dried at 70° under vacuum for 24 hours [Prasad et al. J Am Chem Soc 108 5135 1986], and recrystallised three times from MeOH/isopropanol [Stramel Thomas J Chem Soc, Faraday Trans 82 799 1986, Michaelis Hill J Am Chem Soc 55 1481 1933, Tilfoid et al. J Am Chem Soc 70 4005 1948]. [Beilstein 23 149.]... [Pg.497]

If the equivalent of an element in any chemical state is taken as defined by Faraday s second law (see p. 122) then valency=atomic weight -f equivalent, and is a pure number. A distinction between valency and affinity was expressed by A. Michaelis, and Wurtz distinguished affinity, or the force of... [Pg.918]


See other pages where Faraday, Michae is mentioned: [Pg.801]    [Pg.1057]    [Pg.376]    [Pg.100]    [Pg.167]    [Pg.48]    [Pg.8]    [Pg.414]    [Pg.544]    [Pg.210]   
See also in sourсe #XX -- [ Pg.16 ]




SEARCH



Faraday

© 2024 chempedia.info