Seik Weng Ng

University of Nottingham Malaysia Campus

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Co-Authors

Edward R. T. Tiekink

Sunway University

168

Shan Gao

Heilongjiang University

109

Abdullah M. Asiri

King Abdulaziz University

Mostafa M. Amini

Shahid Beheshti University

Kong Mun Lo

Sunway University

Hassan M. Faidallah

Alexandria University

Hapipah Mohd Ali

Mayo Clinic in Arizona

Ezzatollah Najafi

Payame Noor University

Abdulrahman O. Al‐Youbi

King Abdulaziz University

El Mokhtar Essassi

Mohammed V University

Cooperative Institutions

University of Malaya

159

Chinese Academy of Sciences

132

Sun Yat-sen University

Zhengzhou University

University of Chinese Academy of Sciences

Xiamen University

Nanjing University

Ministry of Education of the People's Republic of China

Zhejiang University

Shahid Beheshti University

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CCDC 1040369: Experimental Crystal Structure Determination

The Cambridge Structural Database (2015)

Mohammad Ghanbari Ebrahim Kianmehr Sara Karimi Behzad Seik Weng Ng

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cc13xl9x

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4-(4-Chlorobenzyl)-5-methyl-2-phenyl-1H-pyrazol-3(2H)-one

Acta Crystallographica Section E Structure Reports Online (2011)

Shaaban K. Mohamed Mahmoud Abd El Aleem Ali Ali El‐Remaily Ahmed M. Soliman H. Abdel‐Ghany Seik Weng Ng

The five-membered ring of the title compound, C(17)H(15)ClN(2)O, is almost planar (r.m.s. deviation = 0.008 Å), and its phenyl subsitutent is aligned at 34.9 (1)° with respect to this ring. The angle at the methyl-ene C atom is opened to 116.4 (2)°. In the crystal, adjacent mol-ecules are linked by an N-H⋯O hydrogen bond, generating a linear chain along the a axis.

Chain (unit)

Crystal (programming language)

10.1107/s1600536811013791

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2-(1H-1,3-Benzodiazol-2-ylsulfanyl)-1-(4-chlorophenyl)ethanone

Acta Crystallographica Section E Structure Reports Online (2011)

Hatem A. Abdel‐Aziz Seik Weng Ng Edward R. T. Tiekink

The mol-ecule in the structure of the title compound, C(15)H(11)ClN(2)OS, displays two planar residues [r.m.s. deviation = 0.014 Å for the benzimidazole residue, and the ketone group is co-planar with the benzene ring to which it is attached forming a O-C-C-C torsion angle of -173.18 (14) °] linked at the S atom. The overall shape is based on a twisted V, the dihedral angle formed between the two planes being 82.4 (2) °. The amine-H atom is bifurcated, forming N-H⋯O and N-H⋯S hydrogen bonds leading to dimeric aggregates. These are linked into a supra-molecular chain along the c axis via C-H⋯π hydrogen bonds. Chains form layers in the ab plane being connected along the c axis via weak π-π inter-actions [3.9578 (8) Å] formed between centrosymmetrically related chloro-substituted benzene rings.

Dihedral angle

Benzimidazole

Residue (chemistry)

10.1107/s160053681103666x

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2-Acetylanilinium chloride

Acta Crystallographica Section E Structure Reports Online (2011)

R. Prasath P. Bhavana Seik Weng Ng Edward R. T. Tiekink

The cation of the title salt, C(8)H(10)NO(+)·Cl(-), is essentially planar [C-C-C-C torsion angle = 4.6 (2)°], the conformation being stabilized by an intra-molecular N-H⋯O hydrogen bond. In the crystal, centrosymmetric aggregates are formed via N-H⋯Cl hydrogen bonds. These dimeric aggregates are sustained in the crystal packing by a combination of C-H⋯Cl, C-H⋯O and C-O⋯π [O⋯ring centroid(benzene ring) = 3.1871 (13) and 3.3787 (13) Å] inter-actions.

Crystal (programming language)

Dihedral angle

10.1107/s1600536811004739

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6-Amino-5-(1-amino-2,2-dicyanovinyl)-3,3a,4,5-tetrahydro-2H-indene-4-spiro-1′-cyclopentane-3a,7-dicarbonitrile–thiophene-2-carbaldehyde (1/0.5)

Acta Crystallographica Section E Structure Reports Online (2010)

Abdullah M. Asiri Seik Weng Ng

In each of the two independent indene-4-spiropentane molecules in the asymmetric unit of the title 2:1 adduct, C19H18N6·0.5C5H4OS, the cyclohexene ring adopts a half-chair conformation and the cyclopentene and cyclopentane rings adopt envelope conformations. The mean plane through the cyclohexene/cyclopentene fused system is aligned at a dihedral angle of 77.9 (1)° with respect to the mean plane through the cyclopentane ring in one molecule and 87.0 (1)° in the other. In the crystal, adjacent indene-4-spiropentane molecules are linked by N—H⋯N hydrogen bonds into a three-dimensional network. The spaces within the network are occupied by the thiophene-2-carbaldehyde molecules. The thiophene-2-carbaldehyde unit is disordered over two positions of equal occupancy. The crystal studied was found to be a non-morohedral twin with two minor twin components of 18.4 and 9.7%.

Cyclopentanes

Indene

Dihedral angle

Pentane

Crystal (programming language)

Thio-

10.1107/s1600536810034434

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2-Oxo-2,3-dihydro-1H-indol-3-one nicotinoylhydrazone

Acta Crystallographica Section E Structure Reports Online (2005)

Hapipah Mohd Ali Siti Nadiah Abdul Halim W.J. Basirun Seik Weng Ng

In the title structure, C14H10N4O2, the pyridyl ring is twisted with respect to the central —C(=O)—NH—N= fragment by 17.7 (1)°, whereas the indole fused-ring system is almost coplanar with this fragment. Molecules are linked into a linear chain motif by N—H⋯O hydrogen bonds.

Fragment (logic)

10.1107/s1600536805006628

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1-Methyl-3,3-bis[(4-methylphenyl)sulfanyl]piperidin-2-one

Acta Crystallographica Section E Structure Reports Online (2011)

J. Zukerman‐Schpector Paulo R. Olivato Carlos R. Cerqueira Jean M. M. Santos Seik Weng Ng

The piperidone ring in the title compound, C(20)H(23)NOS(2), has a half-chair distorted to a twisted-boat conformation [Q(T) = 0.5200 (17) Å]. One of the S-bound benzene rings is almost perpendicular to the least-squares plane through the piperidone ring, whereas the other is not [dihedral angles = 75.28 (5) and 46.41 (5) Å, respectively]. In the crystal, the presence of C-H⋯O and C-H⋯π inter-actions leads to the formation of supra-molecular layers in the ab plane.

Sulfanyl

10.1107/s1600536811037111

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(Dimethyl sulfoxide-κO)(2-formylphenolato-κ²O,O′)[2-(2-oxidobenzylideneamino)phenolato-κ³O,N,O′]manganese(III)

Acta Crystallographica Section E Structure Reports Online (2011)

Inba Raja Kong Mun Lo Seik Weng Ng

The O-C(6)H(4)-CH=N-C(6)H(4)-O dianion of the title compound, [Mn(C(13)H(9)NO(2))(C(7)H(5)O(2))(C(2)H(6)OS)], acts as an O,N,O'-chelate to bind to the Mn(III) atom, and the three atoms constitute three points [O-Mn-O = 174.43 (11)°] of an octa-hedron around the metal atom. The azomethine linkage is disordered over two positions in a 0.657 (13):0.343 (13) ratio. The deprotonated salicyldehyde anion acts as an O,O'-chelate; the sixth coordination site is represented by the O atom of the dimethyl sulfoxide mol-ecule. The crystal studied was a non-merohedral twin with a minor twin component of 14.2 (3)%.

10.1107/s1600536811015935

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Dichlorobis(phenothiazine-κS)palladium(II)

Acta Crystallographica Section E Structure Reports Online (2005)

Xuanjun Zhang Dan Li Xiao‐Ping Zhou Seik Weng Ng

In the title complex, [PdCl2(C12H9NS)2], the Pd atom lies on a center of inversion and is coordinated by two chloride anions and two S atoms from two phenothiazine ligands, forming a square-planar PdCl2S2 geometry. In the crystal structure, a one-dimensional polymer structure is constructed via N—H⋯Cl and N—H⋯N hydrogen bonds.

Square (algebra)

10.1107/s1600536805005799

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Citations (1)

CCDC 842814: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

Afsaneh Zonouzi Roghieh Mirzazadeh Seik Weng Ng

10.5517/ccx90kr

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