carbenoid

Adjective

 * 1)  characteristic of a carbene

Noun

 * 1)  any molecular entity having the characteristics of a carbene or acting as a source of carbenes
 * Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich (referring to a carbon atom with a diazo group, which departs as nitrogen leaving a carbene that reacts with another reagent)
 * The combination of an electron-withdrawing (EWG) and an electrondonating substituent (EDG) on the carbenoid appears to be the crucial requirement for high diastereoselectivity and enantioselectivity when the rhodium(II) prolinate system is used.