Methyl 2-[2-(tert-but­oxy­carbonyl­amino)-1,3-benzothia­zole-6-carboxamido]­acetate

In the title compound, C₁₆H₁₉N₃O₅S, the dihedral angle between the benzene ring and the carbonyl­amino group is 18.18 (2)°. In the crystal, mol­ecules form centrosymmetric dimers via pairs of N—H...N hydrogen bonds. The dimers are connected via N—H...O hydrogen bonds into a three-dimensional network..

catena-Poly[[(2-amino-1,3-benzothia­zole-6-carboxyl­ato-κ²O,O′)(2,2′-bipyridyl-κ²N,N′)cadmium]-μ-2-amino-1,3-benzothia­zole-6-carboxyl­ato-κ³N¹:O,O′]

In the title coordination polymer, [Cd(C₈H₅N₂O₂S)₂(C₁₀H₈N₂)]_n, the Cd^II ion is coordinated by a bidentate 2,2-bipyridyl ligand, two O,O′-chelating 2-amino-1,3-benzothia­zole-6-carboxyl­ate (ABTC) ligands and one N-bonded ABTC ligand. The resulting CdN₃O₄ coordination polyhedron approximates to a very distorted penta­gonal bipramid with one O and one N atom in axial positions. One of the ABTC ligands is bridging to an adjacent metal atom, generating an infinite chain propagating in [100]. A three-dimensional network is constructed from N—H...O and N—H...N hydrogen bonds and aromatic π–π stacking inter­actions [centroid–centroid separations = 3.641 (2) and 3.682 (3) Å].

3,4-Bis(4-meth­oxy­phen­yl)-2,5-dihydro-1H-pyrrole-2,5-dione

In the title compound, C₁₈H₁₅NO₄, the benzene rings form quite different dihedral angles [16.07 (1) and 59.50 (1)°] with the central pyrrole ring, indicating a twisted mol­ecule. Conjugation is indicated between the five- and six-membered rings by the lengths of the C—C bonds which link them [1.462 (3) and 1.477 (3) Å]. The most prominent feature of the crystal packing is the formation of inversion dimers via eight-membered {...HNCO}₂ synthons.