Structure of 3-benzyl-1,4,7,10,13-pentaoxacyclopentadecane-2,5,9-trione

Abstract

Abstract. CivH2008, monoclinic, P2i/b, Z = 4, a = 10.798(11), b = 9.057(10), c = 17.585 (31)A, y = 93.02 (2) ° , V= 1717.4/~3 Dx = 1.36 Mg m -3,/~= 0.106 mm -l. The structure was solved by direct methods and refined by least-squares procedures to a final R of 0.048 for 2254 independent reflections. The interatomic distances and bond angles are in good agreement with previously published values. The 15-membered ring forms a distorted square. The three ester groups are in the trans form: two groups are almost perpendicular to the mean plane of the macrocycle and the third is displaced from it. The overall conformation is stabilized by both intra-and