CLATHRATE FORMATION IN THE TETRAISOAMYLAMMONIUM PROPIONATE WATER-SYSTEM

In this paper we examine clathrate formation in the tetraisoamylammoni um propionate-water binary system. We have found formation of four pol yhydrates, two of which are metastable over the whole temperature rang e studied. All polyhydrate crystals were isolated and their compositio ns and densities determined; for (i-C5H11)(4)NC2H5COO.36.5H(2)O, unit cell parameters were additionally found. The results are compared with data for tetra-n-butylammonium carboxylate polyhydrates, and the stru cture of the title compounds is suggested it is confirmed that the iso amyl radical stabilizes the tetradecahedral void of the clathrate hydr ate framework better than the n-butyl radical.