Abstract: Organometallic compound containing divalent tin, 1,1 '-diisopropenylstanno-cene(Ⅱ)(1) was prepared by the reaction between cyclopentadienyllithtum and stannous chloride, it is an air-sensititvc compound. 1, 1'-diisopropenyldichlorotita-nocene (2), which is very stable in air, can also be synthesized by the same method. The properties of these two compounds were compared in this paper.