for its solubilization by both soaps, and a lcsscr interaction with the anion is indicated than for methanol, which is solubilized at higher concentrations by a hydrogen-bonding effect. Acetonc and diethyl ether are bot>hvery feebly bound by lJg(DX'NS)2, and although data are not available, it should be expccted that XaDXNS would solubilize thcse compounds to a lesser extent than would Mg(DNSS)*. It is probablc that the ether and ketone both interact principally by coordination with the cation. The curve for methyl acetate suggests that the estcr is solubilized cxclusively by the cation. The initial slope distinctly differentiates the ester from the ether and kctone.
Discussion I I N S O N (Stanford I.niversity, Califorriiit). 1 quite agree wi1.h hlr. K:tufriiari's basic premise t h a t the important thing to be otmerved ahout thc c-lasclesof phenoriiena that generally go under the iinirie of clolubilimtiori is t h t the t herrriotiyri:iniic. activi1.y of onc c*orriponent of a iiiultic,orril)onent systctni is reduced by tiit presence of another c*oriipoiieiit-- the so1ut)ilizer. .4lthougli we c a n discern, t o be snre, riiany iristancw in which tho solribilixing actioii can he t r a m i to it mec:hnnisrn which tieperids o n !,he existerice of rriicelles in or on which the solubilimte is at,t;tcahed, t.hcre is no good (L p i o r i reasori to restrict the riame so1ut)ilizatiori t o just t,hat, kind of ;ict,itrn. Vrorii )t thrririodvriarnit. viewpoint, one caririot distinguish txtweeri Inatcri:tls solutiilized in rnicc:llcs, rnatc~rialsulsortted on t hc s u r f w e of particles, or, :is in M r . Kaufrii:~n'sc!xpcrirnents, niaterials which ;Lppe:tr to be strongly xssocktcd with ttie physicnlly srnnller portion of a long-chain salt.
