The crystal structures of two (oxo-thia-zolidin-2-yl-idene)acetamides, namely (Z)-2-[2-(morpholin-4-yl)-2-oxo-ethyl-idene]thia-zolidin-4-one, C9H12N2O3S, (I), and (Z)-N-(4-meth-oxy-phen-yl)-2-(4-oxo-thia-zolidin-2-yl-idene)acetamide, C12H12N2O3S, (II), are described and compared with a related structure. The Z conformation was observed for both the compounds. In (I), the morpholin-4-yl ring has...

due to the importance of the role of land use changes on runoff changes, several studies have taken place to develop models with simulating land use changes. in this study, the l-thia model was used for estimating the runoff made by land use changes in chalousrud watershed. results of runoff modeling using l-thia model showed that runoff depth increased from 422.98mm to 809.168mm during 1984 to...

In the title compound, C(15)H(14)Cl(2)N(2)OS, the piperidine ring adopts a chair conformation. The dihedral angle between the thia-zolidine ring and the dichloro-benzene ring is 9.30 (4)°; this near coplanar conformation is stabilized by the formation of an intra-molecular C-H⋯S hydrogen bond, which generates an S(6) ring. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming [...

The asymmetric unit of the title compound, C(10)H(9)ClN(4)S, common name thia-cloprid, comprises two mol-ecules. In both mol-ecules, the thia-zolidine rings are almost planar (with r.m.s. deviations of 0.016 and 0.065 Å) and form dihedral angles of 73.36 (6) and 70.25 (8)° with the 2-chloro-pyridine rings. In the crystal, inter-molecular C-H⋯N hydrogen bonds links the mol-ecules into chains pro...

In the title compound, C(17)H(11)N(5)S(2), the dihedral angles formed between the triazole ring and the benzene ring and the 1,3-benzothia-zole ring system are 8.67 (8) and 13.90 (9)°, respectively. The conformation of the triazolo-thia-diazin-3-yl fused ring system is a twisted half-chair. Overall, the mol-ecule adopts a flattened shape. Supra-molecular helical chains along the a axis sustaine...

In the title compound, C(10)H(8)N(4)OS, the dihedral angle between the pyridine and thia-zolidine rings is 52.5 (5)°. Inter-molecular C-H⋯N inter-actions help to stabilize the crystal structure.

The asymmetric unit of the title compound, C(20)H(18)ClN(5)O(3)S, contains two independent mol-ecules with significantly different conformations of the heterocyclic thia-zine rings. In both mol-ecules, the thia-zine rings adopt half-chair conformations, with the S atoms displaced by 0.382 (3) and 0.533 (3) Å and N atoms -0.351 and -0.275 Å, respectively, from the planes formed by the remaining ...

In the title compound, C17H17N3O3S, the cyclo-pentane ring is disordered over two sets of sites with an occupancy ratio of 0.775 (8):0.225 (8) for the affected atoms. The thia-zolidinyl ring is planar (r.m.s. deviation = 0.024 Å) and forms a dihedral angle of 65.13 (8)° with the attached phenyl ring. The mol-ecular packing is stabilized by C-H⋯O and C-H⋯π inter-actions, forming a three-dimensio...

In the title compound, C(11)H(11)NO(4)S·H(2)O, the five-membered thia-zolidine ring is nearly planar, with a maximum deviation of 0.010 (2) Å. The dihedral angle between the thia-zolidine and benzene rings is 49.16 (9)°. Inter-molecular O-H⋯O and N-H⋯O hydrogen bonding is present in the crystal structure.