Trityl-L-serine triethyl ammonium salt

In the anion of the title salt, C(6)H(16)N(+)·C(18)H(13)O(8) (-), one of the carboxyl groups is deprotonated. Its O atoms are involved in inter-molecular hydrogen bonding with the carboxyl group of an adjacent anion and the amino group of an adjacent cation. The two benzoyloxy rings are oriented with respect to each other at a dihedral angle of 79.46 (6)°.

In the anion of the title molecular salt, C(6)H(16)N(+)·C(6)H(4)O(5)S(-), the nitro group is twisted slightly from the benzene ring, making a dihedral angle of 3.16 (10)°. In the crystal structure, the cations and anions are linked into a two-dimensional network parallel to the ab plane by C-H⋯O and N-H⋯O hydrogen bonds.

The mol-ecular structure of the title salt, C6H16N(+)·C20H11N6O12S(-), shows a planar geometry of the benzamido-phen-yl-sulfonyl moiety, with a dihedral angle of 1.59 (9)° between the aromatic ring planes. The central ring and the aromatic ring of the other dinitro-benzamide group are nearly perpendicular, making a dihedral angle of 89.55 (9)°. All nitro groups lie almost in plane with the associated aromatic rings, the O-N-C-C torsion angles ranging from 9.2 (2) to 24.3 (2)°. In the crystal, strong anion-anion N-H⋯O and anion-cation hydrogen bonds form inversion dimers stacked along the a axis. Less prominent anion-anion C-H⋯O inter-actions lead to the formation of a three-dimensional network including anion-anion dimers as well as anion-anion chains along [100?].