2,2′-Diamino-4,4′-bi-1,3-thia­zolium (2R,3R)-tartrate

Crystals of the title chiral compound, C₆H₈N₄S₂²⁺·C₄H₄O₆²⁻, were obtained from a solution containing diamino­bithia­zole (DABT) and racemic tartaric acid. The crystal structure consists of a protonated DABT dications (H₂DABT) and (2R,3R)-tartrate dianions linked via hydrogen bonding. An overlapped arrangement and a centroid-to-centroid separation of 3.4620 (11) Å between nearly parallel thia­zole rings of adjacent H₂DABT cations indicate the existence of π–π stacking in the crystal structure.

A two-dimensional cadmium(II)–imino­diacetate polymer

The title compound, poly[[aqua­tri-μ₃-imino­diacetato-tricadmium(II)] trihydrate], {[Cd₃(C₄H₅NO₄)₃(H₂O)]·3H₂O}_n, consists of a polymeric Cd^II–imino­diacetate network and uncoordinated water mol­ecules. One Cd atom located on a general position is surrounded by three imino­diacetate (IDA) dianions, while a second Cd atom located on a mirror plane is coordinated by three IDA dianions and one water mol­ecule. Both Cd^II atoms possess distorted octa­hedral coordination geometries. The imino­diacetate dianion bridges neighbouring Cd^II atoms to form polymeric sheets.

Aqua­(2,2′-diamino-4,4′-bi-1,3-thia­zole-κ²N,N′)(thio­diacetato-κ³O,S,O′)cobalt(II) dihydrate

The title Co^II complex, [Co(C₆H₆N₄S₂)(C₄H₄O₄S)(H₂O)]·2H₂O, assumes a distorted octa­hedral coordination geometry formed by a diamino­bithia­zole (DABT) ligand, a thio­diacetate dianion (TDA) and a water mol­ecule. The TDA dianion chelates to the Co^II atom with a facial configuration. Within the chelating DABT ligand, the two thia­zole rings are twisted with respect to each other [dihedral angle = 12.04 (9)°].

A dimeric manganese(II) complex bridged by 4-amino­benzoate

The dimeric Mn^II title complex, di-μ-4-amino­benzoato-bis­[(4-amino­benzoato)(2,2′-diamino-4,4′-bithia­zole)manganese(II)] dihydrate, [Mn₂(C₆H₆N₄S₂)₂(C₇H₆NO₂)₄]·2H₂O, bridged by amino­benzoate anions, is located on an inversion center. Each Mn^II atom is coordinated by one diamino­bithia­zole and three amino­benzoate ligands with a distorted octa­hedral geometry.

(2,2′-Diamino-4,4′-bi-1,3-thia­zole-κ²N,N′)bis­(glycinato-κ²N,O)cobalt(II) dihydrate

In the title compound, [Co(C₂H₄NO₂)₂(C₆H₆N₂S)]·2H₂O, the Co^II ion (site symmetry 2) is coordinated by an N,N-bidentate diamino­bithia­zole ligand and two N,O-bidentate glycinate anions in a distorted octa­hedral geometry. The five-membered Co–glycinate ring displays an envelope conformation. A network of O—H...O and N—H...O hydrogen bonds helps to consolidate the crystal packing.

catena-Poly[[chloro­(2,2′-diamino-4,4′-bi-1,3-thia­zole-κ²N,N′)cadmium(II)]-μ-glycinato-κ²N,O:O′]

In the polymeric title complex, [Cd(C₂H₄NO₂)Cl(C₆H₆N₄S₂)]_n, the glycinate anions bridge neighbouring Cd^II ions to form zigzag chains along the b axis direction. The Cd^II ion is coordinated by two glycinate ions (one O-monodentate and one N,O-bidentate), a Cl⁻ ion and a bidentate diamino­bithia­zole ligand in a distorted octa­hedral geometry. Various N—H...O and N—H...Cl hydrogen bonds between adjacent complex chains help to consolidate the crystal packing.

2,2′-Diamino-4,4′-bi-1,3-thia­zol-3,3′-diium bis­(2,2′-diamino-4,4′-bi-1,3-thia­zol-3-ium) tetra­kis(2-nitro­benzoate)

The crystal structure of the title compound, C₆H₈N₄S₂²⁺·2C₆H₇N₄S₂⁺·4C₇H₄NO₄⁻, comprises diprotonated diamino­bithia­zole (DABT) dications located on inversion centers, monoprotonated DABT cations and nitro­benzoate anions. The relatively short C—N(amino) bond distances, ranging from 1.310 (2) to 1.350 (2) Å, indicate electron delocalization between the amino groups and thia­zole rings. Inter­molecular N—H...O and N—H...N hydrogen bonds stabilize the crystal packing.