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

cheletropic reaction 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 form of cycloaddition across the terminal atoms of a fully conjugated system with formation of two new sigma bonds to a single atom of the ("monocentric") reagent. There is formal loss of one pi bond in the substrate and an increase in coordination number of the relevant atom of the reagent. An example is the addition of sulfur dioxide to butadiene:

The reverse of this type of reaction is designated "cheletropic elimination". WOODWARD and HOFFMANN (1969).

See also:
circuit definition
chlorohydrins definition
circuit geometries definition
cine-substitution definition
chlorohydrins definition
© 1999-2007 ChemiPlus.net | About us | Contact us