1.Chlorotetramethoxyantimony was obtained by the action of acetyl chloride on pentamethoxyantimony.2.Triethoxy-, tripropoxy-, and triisobutoxyantimony are partially associated under conditions of cryoscopy in cyclohexane, while triisopropoxy- and tri-tert-butoxyantimony are monomeric. Under ebullioscopy conditions in CCl4, 2-ethoxy-4-methyl-1, 3,2-dioxastibinane exists in a monomeric form.3.According to the data of cryoscopic and ebullioscopic measurements, pentaethoxyantimony exists in benzene in a dimeric form. Dimers of tetrachloromethoxy-, trichlorodimethoxy-, and dichlorotrimethoxyantimony are partially dissociated in benzene.