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Kim H.,Gyeongsang National University | Shin Y.W.,Test and Analytical Laboratory | Park K.-M.,Gyeongsang National University | Kim J.,Gyeongsang National University | Kim T.H.,Gyeongsang National University
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

The title compound, C6H11N2O 4PS3, crystallizes with two independent molecules in the asymmetric unit. The dihedral angles between the thiadiazole ring planes and the PS2 planes of the phosphorodithioate group are 86.51 (5) and 56.33 (5)° in the two molecules. In the crystal, weak intermolecular S⋯S [3.570 (8) Å] interactions and C - H⋯O and C - H⋯N hydrogen bonds contribute to the stabilization of the packing. Source


Cheon S.,Gyeongsang National University | Shin Y.W.,Test and Analytical Laboratory | Park K.-M.,Gyeongsang National University | Kim J.,Gyeongsang National University | Kim T.H.,Gyeongsang National University
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title compound, C14H14Cl2N 2O, the imidazole ring is almost parallel to the benzene ring, the dihedral angle between them being 7.3 (2)°. In the crystal, there is an inter-molecular C - Cl⋯π inter-action (Cl⋯centroid = 3.36 Å and C - Cl⋯centroid = 89.2°). In addition, a Cl⋯Cl contact of 3.411 (1) Å and an inter-molecular C - H⋯N hydrogen bond are observed. These inter-actions contribute to the stabilization of the crystal packing. Source


Lee S.,Gyeongsang National University | Kim T.H.,Gyeongsang National University | Shin Y.W.,Test and Analytical Laboratory | Jeon Y.,Gyeongsang National University | Kim J.,Gyeongsang National University
Acta Crystallographica Section E: Structure Reports Online | Year: 2013

In the asymmetric unit of the title compound {systematic name: N′-(2,4-dimethylphenyl)-N-[N-(2,4-dimethylphenyl)carboximidoyl] -N-methylmethanimidamide}, C19H23N3, which is a formamidine pesticide, there are two independent and conformationally similar molecules, with the dihedral angle between the mean planes of the 2,4-dimethylbenzene rings in each molecule being 41.63 (6) and 42.09 (5)°. The crystal structure is stabilized by a C - H⋯N hydrogen bond, as well as weak intermolecular C - H⋯π and π-π interactions [ring centroid separation = 3.7409 (15) Å], giving one-dimensional chains extending down the b direction. Source


Heo K.S.,LG Corp | Hyun M.H.,Korea University | Cho Y.J.,Test and Analytical Laboratory | Ryoo J.J.,Kyungpook National University
Chirality | Year: 2011

(R)-N-3,5-dinitrobenzoyl (DNB) leucine derived chiral selector was used as an HPLC chiral stationary phase for the resolution of various racemic amino acids derivatives. In this study, determination of optical purity of an amino acid derivative was performed by chiral high performance liquid chromatography and 1H and 13C NMR spectroscopy by using the DNB leucine derived chiral selector. The accuracy and precision of each optical purity value are calculated and the data are compared to each other. Chirality, 2011. © 2010 Wiley-Liss, Inc. Source


Kim T.H.,Gyeongsang National University | Lee S.,Gyeongsang National University | Jeon Y.,Gyeongsang National University | Shin Y.W.,Test and Analytical Laboratory | Kim J.,Gyeongsang National University
Inorganic Chemistry Communications | Year: 2013

A two-dimensional network stair-step Cu4I4 coordination polymer (1) based on 1,4-bis((methylthio)propanoyl)piperazine was prepared. No emission was observed from 1 (off state), while a heated sample (2) of 1 emitted a strong green light (on state). Conversion between 1 and 2 was reversible upon removal of acetonitrile or exposure of 2 to acetonitrile. © 2013 The Authors. Source

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