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Physical Sciences and Mathematics Commons

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Chemistry

SelectedWorks

Tan Kong Wai

Publication Year

Articles 1 - 4 of 4

Full-Text Articles in Physical Sciences and Mathematics

(2e)-1-(6-Chloro-2-Methyl-4-Phenylquinolin-3-Yl)-3-Phenylprop-2-En-1-One, Tan Kong Wai, Viji A. J., Vijayakumar V., Sarveswari S. Jan 2010

(2e)-1-(6-Chloro-2-Methyl-4-Phenylquinolin-3-Yl)-3-Phenylprop-2-En-1-One, Tan Kong Wai, Viji A. J., Vijayakumar V., Sarveswari S.

Tan Kong Wai

In the title compound, C(25)H(18)ClNO, the conformation about the C=C double bond is E. Significant twists are evident in the molecule, with the benzene ring forming a dihedral angle of 53.92 (11)degrees with the quinolinyl residue. Further, the chalcone residue is approximately perpendicular to the quinolinyl residue [C(q)-C(q)-C(c)-O(c) torsion angle = -104.5 (3)degrees, where q = quinolinyl and c = chalcone]. In the crystal, the presence of C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions leads to supramolecular layers lying parallel to ((1) over bar 02).


(4-Hydroxy-2-Oxidobenzaldehyde Thiosemicarbazonato-Kappa O-3(2),N-1,S)(1, 10-Phenanthroline-Kappa N-2,N ')Zinc(Ii) Dimethyl Sulfoxide Disolvate Monohydrate, Tan Kong Wai, Ng C. H., Ng S. W., Maah M. J. Jan 2009

(4-Hydroxy-2-Oxidobenzaldehyde Thiosemicarbazonato-Kappa O-3(2),N-1,S)(1, 10-Phenanthroline-Kappa N-2,N ')Zinc(Ii) Dimethyl Sulfoxide Disolvate Monohydrate, Tan Kong Wai, Ng C. H., Ng S. W., Maah M. J.

Tan Kong Wai

The Zn-II atom in the title compound, [Zn(C8H7N3O2S)-(C12H8N2)]center dot 2C(2)H(6)OS center dot H2O, is N,N '-chelated by the N-heterocycle and N, O, S-chelated by the deprotonated Schiff base in a distorted square-pyramidal enviroment. Hydrogen bonds link the mononuclear molecule, the water and the dimethyl sulfoxide (DMSO) molecules into a linear chain motif. One DMSO molecule is disordered over two positions in respect of the S atom in an approximate 1:1 ratio.


2,4-Dihydroxybenzaldehyde 4-Ethylthiosemicarbazone, Tan Kong Wai, Ng C. H., Ng S. W., Maah M. J. Jan 2008

2,4-Dihydroxybenzaldehyde 4-Ethylthiosemicarbazone, Tan Kong Wai, Ng C. H., Ng S. W., Maah M. J.

Tan Kong Wai

The molecular conformation of the title compound, C(10)H(13)N(3)O(2)S, is stabilized by an intramolecular O-H center dot center dot center dot N hydrogen bond. Adjacent molecules are linked by O-H center dot center dot center dot O hydrogen bonds to furnish a zigzag chain.


Chlorido(2-Methyl-4-Oxo-4h-Pyran-3-Olato-Kappa(2)O(3),O4)(1,10-Phenanthr Oline-Kappa(2)N, N ')Copper(Ii), Tan Kong Wai, Ng C. H., Ng S. W., Maah M. J. Jan 2008

Chlorido(2-Methyl-4-Oxo-4h-Pyran-3-Olato-Kappa(2)O(3),O4)(1,10-Phenanthr Oline-Kappa(2)N, N ')Copper(Ii), Tan Kong Wai, Ng C. H., Ng S. W., Maah M. J.

Tan Kong Wai

The copper(II) atoms in the two independent molecules of the title compound, [Cu(C(6)H(5)O(3))Cl(C(12)H(8)N(2))], both adopt square-pyramidal geometries. The two coordinating atoms of the two heterocyclic ligands comprise the square plane, and the chlorine atom occupies the apical position of the coordination environment.