Structure of N,N ',N ''-tris(carboxymethyl)-1,3,5-benzenetricarboxamide trihydrate

The title compound, C15H15N3O9. 3H(2)O, crystallizes in the centrosymmetric space group R (3) over bar with a = 13.642(5), b = 13.642(5), c = 18.692(5 ) Angstrom, D-calc, = 1.440 g cm(3), and z = 6. An extensive three-dimensio nal hydrogen bonded network is observed. The network arises from 15 hydroge n bonds per asymmetric unit. Six identical N-H ... O hydrogen bonds are for med between two triacid molecules, which results in the face-to-face dimeri zation of the two triacid molecules. The dimers form extended sheets throug h hydrogen bond interaction with water molecules. The sheets are held toget her by hydrogen bonds via the water molecules. The planes of the benzenoid ring are parallel to each other.