The synthesis of 1, 5-dibenzamido-3-oxapentane (DEBA) and 1, 8-dibenzamid0-3, 6- dioxaoctane (TEBA), model compounds of polyamides with repeating units [-HNCOC~ H~ CONH (CHZ) ZO (CH~)~-] and [-HNCOC6H4-CONH (CH~)~ O (CHZ)~ O (CHZ)~-], respectively, is reported. The mean-square dipole moment,(p2), of both compounds was measured in dioxane solutions in the interval of temperatures 30-60 OC. The values of this ...