十一烯酸[CH_2:CH(CH_2)_8CO_2H]具有杀菌、防腐作用。它与铁、钙、铝、铋、锌、银、汞等金属的化合物早已被制出并得到应用。稀土与十一烯酸的化合物尚未见报道。 本文报道十五种稀土的十一烯酸盐的制备。其组成及基本物化性质,证实这些化合物的组成为REA_3·nH_2O(RE为稀土离子,A为十一烯酸根,n=1,2)。 Undecylenic acid [CH_2: CH (CH_2) _8CO_2H] has bactericidal and antiseptic effects. It has long been formulated and used with compounds of metals such as iron, calcium, aluminum, bismuth, zinc, silver and mercury. Rare earth and undecylenic acid compounds have not been reported. This article reports the preparation of fifteen rare earth undecylenates. Its composition and basic physical and chemical properties, confirmed that the composition of these compounds REA_3 · nH_2O (RE is rare earth ions, A is undecylenate, n = 1,2).