(4R*,5R*)-2-(4-Meth­oxy­phen­yl)-1,3-dioxolane-4,5-dicarboxamide

In the title compound, C₁₂H₁₄N₂O₅, the five-membered 1,3-dioxolane ring has a twisted conformation. In the crystal, N—H...O and C—H...O hydrogen bonds link the mol­ecules into a two-dimensional network lying parallel to the ab plane. There are also C—H...π inter­actions present in the crystal structure.

Bis(3,5-di-tert-butyl-4H-1,2,4-triazol-4-amine-κN¹)(nitrato-κO)silver(I) ethanol monosolvate monohydrate

The Ag^I atom in the title compound, [Ag(NO₃)(C₁₀H₂₀N₄)₂]·C₂H₅OH·H₂O, is coordinated by the N atoms of two N-heterocycles [N—Ag—N = 151.5 (1)°]; the approximately linear coordination geometry is distorted into a T-shaped geometry owing to a long Ag...O_nitrate bond [2.717 (4) Å]. The N atoms of the N-heterocycles that are not involved in coordination point towards the lattice water mol­ecule, which functions as a hydrogen-bond donor. The water mol­ecule itself is a hydrogen-bond acceptor towards the ethanol solvent mol­ecule. Hydrogen bonds of the type N–H...O give rise to a layer motif parallel to (001).

(4R*,5R*)-Diethyl 2-(4-nitro­phen­yl)-1,3-dioxolane-4,5-dicarboxyl­ate

In the title compound, C₁₅H₁₇NO₈, the nitro group is essentially coplanar with the aromatic ring [dihedral angle = 6.4 (3) Å]. The five-membered ring has a twist conformation. In the crystal, C—H...O inter­actions link the mol­ecules into a helical chain propagating along [010].

2-[(3-Bromo­anilino)meth­yl]-1,2-benzo­thia­zol-3(2H)-one

The title compound, C₁₄H₁₁BrN₂OS, was synthesized by the reaction of 1,2-benzothia­zol-3(2H)-one with formalin and 3-bromo­aniline in ethanol. The 1,2-benzothia­zolone ring system is approximately planar [maximum deviation = 0.0142 (s.u.?) Å] and forms a dihedral angle of 79.19 (5)° with the benzene ring. In the crystal, molecules are linked by N—H...O, C—H...O and C—H...Br interactions.