1. A study was made of the hydrolysis of dichlorosilacyclopentane and dichlorosilacyclohexane in ether. The hydrolytic condensation reaction goes with a predominant formation of polysiloxanes having a linear structure. 2. A study was made of the hydrolysis of dichlorosilacyclohexane in toluene. The reaction proceeds with the formation of a mixture of cyclic and linear siloxanes. 3. The specific behavior of the dichloromonosilacycloalkanes in the hydrolytic condensation reaction was shown on the basis of examining the literature data and the experimental results of the present study.