Silicon has a high affinity for ylide carbanions and exerts a stabilizing effect on these carbanions. lJ Phosphorus, arsenic, and sulfur ylides having a silicon substituent directly attached to the carbanion have been synthesized as distillable The stabilizing effect of silicon upon a nitrogen ylide is not well investigated. In an earlier paper4 we reported that the reaction of N-(trimethylsilylmethy1) dimethylamine (la) with benzyne gave ...