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11.
Ting Feng Xin Li Dr. Yuan-Yuan An Dr. Sha Bai Dr. Li-Ying Sun Yang Li Prof. Dr. Yao-Yu Wang Prof. Dr. Ying-Feng Han 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(32):13618-13622
The efficient backbone-directed self-assembly of cyclic metalla[3]catenanes by the combination of tetrachloroperylenediimide (TCPDI)-based dinuclear rhodium(III) clips and 4,4′-diazopyridine or 4,4′-dipyridylethylene ligands is realized in a single-step strategy. The topology and coordination geometry of the cyclic metalla[3]catenanes are characterized by NMR spectroscopy, ESI-TOF-MS spectrometry, UV/Vis-NIR spectroscopy, and X-ray diffraction studies. The most remarkable feature of the formed cyclic metalla[3]catenane is that it contains π-aggregates (ca. 2.6 nm) incorporating six TCPDIs. Further studies revealed that cyclic metalla[3]catenanes can be converted reversibly to their corresponding sodium adducts and precursor building blocks, respectively. This strategy opens the possibility of generating unique supramolecular structures from discrete functional π-aggregates with precise arrangements. 相似文献
12.
S. T. Malinovskii É. B. Coropceanu O. A. Bologa A. P. Rija M. Gdaniec 《Journal of Structural Chemistry》2007,48(3):506-512
Two novel coordination compounds of thiourea-containing trans-octahedral trans-dioximates of trivalent cobalt [Co(DH)2(Tu)2]2[ZrF6]·H2O and [Co(NioxH)2(Tu)2]2[ZrF6]·3H2O, where DH? is the monoanion of dimethylglyoxime, NioxH? is the monoanion of 1,2-cyclohexanone dioxime, Tu is thiourea, are prepared and characterized by single crystal X-ray diffraction. The structures manifest pairwise an almost parallel and perpendicular arrangement of the Tu fragment in respect to the equatorial plane of the coordination core, accompanied by a development of non-bonding intramolecular π-π-and N-H...O-interactions affecting the structures of the compounds in question. The formation of the crystal structures is primarily governed by outer-sphere [ZrF6]2? anions and crystallization water molecules. 相似文献
13.
F.J. Martínez-Martínez I.I. Padilla-Martínez B. Hernández-Carlos R.M. Pérez-Gutiérrez E.V. García-Báez 《Journal of chemical crystallography》2002,32(3-4):63-68
The X-ray diffraction structure of (RS)-5,6-dihydro-7,8-dimethoxy-5-methyl-6-(2-oxopropyl)-(2,3-methylenedioxyphenyl)-[c]-phenanthridine ((RS)-6-acetonyldihydrochelerythrine), isolated as an artifact from Bocconia Arborea, is reported. This compound crystallizes as orthorhombic system, space group Pna21, with a = 13.216(2) Å, b = 7.6547(10) Å, c = 20.096(3) Å. The phenanthridine central ring presents a distorted boat conformation, which gives rise to two planes with 21.30° between them. The acetonyl group at the six position forms weak C — H O and C — H -ring interactions. The title compound was completely characterized in solution by 1H and 13C and 2D NMR experiments. 相似文献