N,N',N''-Tris(2-nitro-benz-yl)-2,2',2''-nitrilo-triethan-aminium trichloride 1.41-hydrate.

The title compound, C(27)H(36)N(7)O(6) (3+)·3Cl(-)1.41H(2)O, is the hydro-chloride of a tripodal amine, and was structurally characterized because the free base, used as a ligand in podate complexes, is an oily material. In the cation, the secondary amine groups are protonated, and, despite the induced Coulombic repulsions, a claw-like conformation is stabilized, with a cavity approximating C(3) point symmetry.

1,4-Bis(2-nitro-phen-oxy)butane.

The asymmetric unit of the title compound, C(16)H(16)N(2)O(6), contains one-half mol-ecule, the mid-point of the central C-C bond being located on a crystallographic inversion center. The crystal structure shows weak inter-actions between the O atoms of the nitro groups and two different C-H groups of the benzene rings. The extended weak hydrogen-bond formation, involving the NO(2) groups, generates an infinite three-dimensional network.

Acyclic Schiff base salts derived from 1,3-diaminopropane and 1,3-diamino-2-hydroxypropane.

Two salts of acyclic Schiff base cationic ligands, namely N,N'-bis(2-nitrobenzyl)propane-1,3-diammonium dichloride monohydrate, C(17)H(22)N(4)O(4)(2+).2Cl(-).H(2)O, (I), and 2-hydroxy-N,N'-bis(2-nitrobenzyl)propane-1,3-diammonium dichloride, C(17)H(22)N(4)O(5)(2+).