Allylphosphines and vinylphosphines are prepared by reaction of a phosphine with an allylhalide or a vinylhalide, respectively. Preferably the phosphine is a secondary phosphine, so that there is formed an allyldialkylphosphine or a dialkylvinylphosphine. The allyldialkylphosphine can be reacted further with dialkylphosphine under free radical conditions to yield a 1,3-bis-(dialkylphosphino)propane The dialkylvinylphosphine can be reacted further with dialkylphosphine under free radical conditions to yield a 1,2-bis-(dialkylphosphino)ethane. These compounds are useful as bidentate ligands.
烯丙基膦和
乙烯基膦分别是通过膦与烯丙基卤化物或
乙烯基卤化物反应制备的。膦最好是仲膦,这样就形成了烯丙基二烷基膦或二烷基
乙烯基膦。烯丙基二烷基膦可在自由基条件下与二烷基膦进一步反应,生成 1,3-双(二烷基膦)
丙烷;二烷基
乙烯基膦可在自由基条件下与二烷基膦进一步反应,生成 1,2-双(二烷基膦)
乙烷。这些化合物可用作双齿
配体。