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Hoong‐Kun Fun S. Kannan Anwar Usman Ibrahim Abdul Razak Suchada Chantrapromma 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(7):m368-m370
In the title compound, [UO2(C15H11O2)2(C14H14OS)], the UVI atom is coordinated by seven O atoms in a distorted pentagonal–bipyramidal geometry. Both diphenylpropane‐1,3‐dionate systems are nearly planar. The sulfoxide moiety is in a distorted tetrahedral geometry, while its two aromatic rings are nearly orthogonal to one another. The crystal packing is stabilized by two bifurcated hydrogen‐bonding interactions involving both uranyl O atoms. 相似文献
53.
J. X. Yang Z. Zhang Y. P. Tian J. Y. Wu Q. L. Liu A. Usman S. Chantrapromma H. K. Fun 《Russian Journal of Coordination Chemistry》2005,31(4):282-285
Copper(II) complex with piperidine-4-carboxylic acid (HPipe-4), Cu(HPipe-4)4(ClO4)2 (I) was prepared and characterized by IR, X-ray diffraction, and thermal analysis. The crystal is orthorhombic with space group Ccca, Z = 8, a =17.415(3) , b =17.399(2) , c = 21.426(3) . The copper atom has a square surrounding and is coordinated by four carboxylato oxygen atoms in monodentate coordination mode. Full-matrix least-squares refinements gave a final R value of 0.0723 for 22169 reflections. The complex consists of two perpendicularly arranged molecules differing slightly in conformations and shows a three-dimensional polymeric structure formed by hydrogen bonds.__________From Koordinatsionnaya Khimiya, Vol. 31, No. 4, 2005, pp. 302–305.Original English Text Copyright © 2005 by Yang, Zhang, Tian, Wu, Liu, Usman, Chantrapromma, Fun.This article was submitted by the authors in English. 相似文献
54.
Anwar Usman Suchada Chantrapromma Hoong‐Kun Fun Bo‐Long Poh Chatchanok Karalai 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o48-o50
In the title complex, C6H12N4·C8H8O3, the hexamethylenetetramine molecule accepts a single intermolecular O—H?N hydrogen bond from the hydroxy group of the 4‐hydroxy‐3‐methoxybenzaldehyde moiety. The non‐centrosymmetric crystal structure is built from alternating molecular sheets of 4‐hydroxy‐3‐methoxybenzaldehyde and hexamethylenetetramine molecules, and is stabilized by intermolecular O—H?N, C—H?O and C—H?π interactions. 相似文献
55.
Anwar Usman Ibrahim Abdul Razak Hoong‐Kun Fun Suchada Chantrapromma Bao‐Guo Zhao Jian‐Hua Xu 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o24-o25
In the title compound, C20H16N2O5, both of the 1‐acetylisatin (1‐acetyl‐1H‐indole‐2,3‐dione) moieties are planar and form a dihedral angle of 74.1 (1)°. Weak intermolecular hydrogen bonds and C—H?π interactions stabilize the packing in the crystal. 相似文献
56.
Anwar Usman Suchada Chantrapromma Hoong‐Kun Fun Bo‐Long Poh Chatchanok Karalai 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(3):o136-o138
In the title 1/2/2 adduct, C4H12N22+·2C6H3N2O5?·2H2O, the dication lies on a crystallographic inversion centre and the asymmetric unit also has one anion and one water molecule in general positions. The 2,4‐dinitrophenolate anions and the water molecules are linked by two O—H?O and two C—H?O hydrogen bonds to form molecular ribbons, which extend along the b direction. The piperazine dication acts as a donor for bifurcated N—H?O hydrogen bonds with the phenolate O atom and with the O atom of the o‐nitro group. Six symmetry‐related molecular ribbons are linked to a piperazine dication by N—H?O and C—H?O hydrogen bonds. 相似文献
57.
Nawong Boonnak Chatchanok Karalai Suchada Chantrapromma Hoong-Kun Fun Kan Chantrapromma 《Tetrahedron》2009,65(15):3003-3013
Cochinchinones I-L (1-3 and 13) along with 11 known xanthones (4-12, 14, and 15) were isolated from the resin and green fruits of Cratoxylum cochinchinense. In addition, four new acetylated compounds (16-19) were derivatized from 7-geranyloxy-1,3-dihydroxyxanthone (14) and 3-geranyloxy-1,7-dihydroxyxanthone (15). All compounds were characterized on the basis of spectroscopic analyses. The structures of cochinchinone I (1), a monoacetate (18) and a dibrosylate (20), were also confirmed by X-ray diffraction analysis. The antibacterial and antifungal activities of selected compounds were evaluated as well. 相似文献
58.
Suchada Chantrapromma Ibrahim Abdul Razak Hoong-Kun Fun Chatchanok Karalai Hao Zhang Fu-Xin Xie Yu-Peng Tian Wen Ma Yin-Han Zhang Shi-Sheng Ni 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(3):289-290
The title compound, a novel 30-membered 2:2 macrocyclic thiocarbohydrazone, C34H32N8O4S2·3C5H5N, has been prepared and crystallographically characterized. The molecule of the compound is twisted. One dioxabutane group is boat-like in shape, whereas the other is highly disordered. The crystal structure is stabilized by inter- and intramolecular hydrogen bonds. 相似文献
59.
Seik Weng Ng Suchada Chantrapromma Ibrahim Abdul Razak Hoong-Kun Fun 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(3):291-292
The triclinic cell of the title compound contains 2C12H24N+·2C6H5O2S− ion pairs that are linked by four hydrogen bonds [N⃛O = 2.728 (3) and 2.758 (3) Å] across a centre of inversion. 相似文献
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Anwar Usman Ibrahim Abdul Razak Suchada Chantrapromma Hoong‐Kun Fun Tarun K. Sarkar Sankar Basak Gur Dayal Nigam 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(9):1116-1117
In the title compound, C16H19ClN2O4, the pyridine ring is nearly planar, the piperidine ring is non‐planar and the cyclohexane ring adopts a screw‐boat conformation. The carboxylate group makes a dihedral angle of 80.9 (2)° with the least‐squares plane through the cyclohexane ring. 相似文献