Novel adamantane-oxalamide derivatives, N, N′-bis (1-adamantylglycine methyl ester) oxalamide (meso-1 and rac-1), N, N′-bis (3-aminoadamantane-1-carboxylic acid methyl ester) oxalamide (2) and N, N′-bis (3-aminoadamantane-1-carboxylic acid) oxalamide (3) were prepared and structurally characterized by spectroscopic methods and X-ray analysis. Crystal packing of the structures meso-1 and rac-1 is defined by one-dimensional α- ...