The adsorption parameters (alpha) of polyalkoxy alkanes CH(4-z)Z(z), CH(3-z)Z(z)(CH2)(n)H, and Z(CH2)(n)CH(3-z)Z(z), in which Z is either CH3O or CH3CH2O, were established experimentally in the usual way.(1-10) In the cases of those homologous series that comprise the structural classifications CH(3-z)Z(z)(CH2)(n)H or Z(CH2)(n)CH(3-z)Z(z), the alpha(n)-values for only two or three of the lower members (n < 5) in a given series were determined experimentally; the rest were established by extrapolation or interpolation using the appropriate log alpha(n) vs n linear relationship, as described in the text, The results obtained thereby support the conclusions derived earlier from similar studies(6) in which Z was either a chloro or a bromo substituent, namely, that liaison between the adsorbed molecule and the polymer at liquid-saturation is monodentate rather than polydentate. The other Z-substituents on the carbon atoms adjacent to the adsorption site affect alpha in a manner that reflects not only the net influence of electronic and steric contributions at this site but also the affinity of these substituents for the mobile sorbed-but-not-adsorbed molecules in the liquid-saturated system. Hence, systematic incrementation of these Z-substituents to the allowable limit at constant n does not afford a linear log alpha(z) vs z relationship but rather reflects one that exhibits a maximum at z = 2 or 3, depending upon the series. On the other hand, similar systematic incrementations of Z on carbon atoms further removed from the adsorption site do exhibit log alpha(z) vs z linear relationships at constant n in the manner previously noted for log alpha(z) vs n relationships at constant z.