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K. Chantrapromma S. Chantrapromma R. Suttirak P. Ruanwas N. Boonnak H.-K. Fun 《Crystallography Reports》2017,62(7):1071-1077
A synthetic route involving 4,6-dimethoxy-2-hydroxy-3-methylbenzoic acid (10) and 2,4-dimethoxy-6-hydroxy-3-methylbenzoic acid (11) has been investigated in the process of synthesis of the natural lichen substance namely, crocynol. Crystal structures of 10 and 11 were determined to confirm the ambiguous structures of the two isomers. Crystals 10 are monoclinic, sp. gr. P21/m, Z = 2. Crystals 11 are monoclinic, sp. gr. P21/c, Z = 4. In the crystal packing of 10, the molecules are arranged into chains along the a-axis formed only by van der Waals interactions, whereas in 11, the molecules are linked by O–H···O and C–H···O hydrogen bonds into chains along the b-axis and further stacked by π···π interactions with the centroid ···centroid distance of 3.6863(8) Å. 相似文献
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Anwar Usman Ibrahim Abdul Razak Suchada Chantrapromma Hoong-Kun Fun Jayanta Kumar Ray Sujit Das Adhikari Bishnu Pada Datta 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(12):1441-1442
In the title compound, C20H20FNO5S, the pyrrolidine ring adopts an envelope conformation. The fluorophenyl and thiophene rings are individually planar. The molecular and crystal structures are stabilized by intra- and intermolecular C—H⋯O interactions. 相似文献
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Jie‐Ying Wu Suchada Chantrapromma Dong‐Wen Chen Yu‐Peng Tian Ping Yang Hoong‐Kun Fun 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(5):523-525
The tetradentate N2S2 Schiff base ligand 3,3′‐[2,2′‐(ethylenedioxy)dibenzylidene]bis(S‐methyl dithiocarbazate) (H2L), prepared by the condensation of S‐methyl dithiocarbazate with 1,4‐bis(2‐formylphenyl)‐1,4‐dioxabutane in a 1:2 molar ratio, reacts with nickel acetate to form the title neutral metal complex, [Ni(C20H20N4O2S4)]. The X‐ray structure of the complex shows a distorted square‐planar geometry around the Ni atom. The monomeric units are weakly associated into dimers via a long Ni?S interaction [3.569 (1) Å]. These dimeric units are then linked by C—H?S intermolecular contacts to form a polymeric chain along the a axis. 相似文献
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Qingli Hao Hoong‐Kun Fun Suchada Chantrapromma Ibrahim Abdul Razak Fangfang Jian Xujie Yang Lude Lu Xin Wang 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(6):717-718
The title coordination complex, [Ni(C14H14O2PS2)2(C12H8N2)] or [Ni(pMePh‐dtp)2(phen)] (phen is 1,10‐phenanthroline; dtp is diaryldithiophosphate), has a non‐crystallographic twofold axis of symmetry through the Ni atom and the phen moiety. Two O,O‐di‐p‐tolyldithiophosphate (dtp) ions act as bidentate ligands. The central metal atom is coordinated by four S atoms from two dtp groups and two N atoms from the phen ligand. The title compound displays distorted octahedral geometry around the central Ni atom. 相似文献
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间苯二甲酸连接的氢键导致的二维锌配位聚合物的合成及晶体结构 总被引:3,自引:0,他引:3
由于配位聚合物在催化材料,磁性材料和光学材料等领域内具有广泛的 应用价值,近年来人们已经合成了不少多维配位聚合物,并对其进行了结构鉴定和性质研究。配位聚合物一般都是通过体系内的配位键、氢键,和金属-金属间相互作用等作用力形成。在大多数的体系中,一般采用含氮基团,如4,4-联吡啶,2,4,6-三(4-吡啶基)-1,3,5-三嗪,1,4-二咪唑丁胺等作为桥连配体合成具有各种不同拓扑结构的无限伸展体系。同时,利用含氧基团作为桥基合成各类配位聚合物也是一个重要的途径,一般为多酸体系,如1,3,5-三苯甲酸,马来酸等。我们通过分子自组装作用,合成了一例由间苯二甲酸作桥基通过氢键导致的金属锌的二维配位聚合物,通过单晶X-射线衍射,研究了它的结构。 相似文献
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Anwar Usman Suchada Chantrapromma Hoong‐Kun Fun 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):m45-m47
The title compound, bis(2,4‐dinitrophenolato‐κ2O,O′)(1,4,7,10,13,16‐hexaoxadecane‐κ6O)barium(II), [Ba(C6H3N2O5)2(C12H24O6)], is a 1:1 complex of barium(II)–2,4‐dinitrophenolate and 1,4,7,10,13,16‐hexaoxacyclooctadecane (18‐crown‐6). Its structure is located on a crystallographic inversion centre. The temperature dependence of the crystal structure has been studied. The monoclinic β angle of the P21/n space group increases with increasing temperature. The packing structure of the complex is stabilized by intermolecular C—H?O interactions. 相似文献