Abstract The X-ray crystal structure of 1, 3-bis (8-quinolyloxy) propane, monoclinic, space group C2/c (No. 15), a= 25.367 (4); b= 4.923 (5) and c= 14.418 (4) Å; β= 111.18 (2) o; Z= 4 has been determined by direct methods. A final least squares refinement based on 812 observed reflections (I> 2δ (I)) gave final R values of R f= 0.043 and R w= 0.034.