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胂叶立德分子中砷原子是以4 d 轨道稳定α-碳负离子,比相应的膦叶立德具有更强的亲核性,甲氧羰亚甲基三苯胂能与醛、酮顺利反应。因此,研究稳定的胂叶立德更具有合成
The arsenic atom in arsonium ylide has 4-d orbital stable α-carbanion, which is more nucleophilic than the corresponding phosphonium ylide. Methoxycarbonylmethylenetriphenylarsine can react smoothly with aldehydes and ketones. Therefore, the study of arsonium ylide is more stable