Add to Del.icio.us Add to Reddit Post to Digg Submit to Newsvine Store at Furl Add to Yahoo Myweb Post to Stumbleupon Post to Google

Periodic Table - Chemistry Definitions - Test your knowledge - Add to Favorites - Useful Resources - Link to Us

selectivity factor definition
 A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 


A quantitative representation of selectivity in aromatic substitution reactions (usually electrophilic, for monosubstituted benzene derivatives). If the partial rate factor, f, expresses the reactivity of a specified position in the aromatic compound PhX relative to that of a single position in benzene, then the selectivity factor Sf (expressing discrimination between p- and m-positions in PhX) is defined as

Sf = lg (fpX/fmX).STOCK and BROWN (1963).

See also:
Separatory funnel definition
Sequence definition
sesquiterpenoids definition
sigma bonds definition
set point definition
© 1999-2007 ChemiPlus.net | About us | Contact us