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排序方式: 共有164条查询结果,搜索用时 15 毫秒
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Ying Liu Ying‐Hui Yu Yi‐Fu Liu Guang‐Feng Hou Xiao‐Dan Wang Bo Wen Jin‐Sheng Gao 《无机化学与普通化学杂志》2013,639(1):193-196
The cage‐like complex, Ag4L4(NO3)4 ( 1 ) [L = 1, 4‐bis(pyridine‐2‐ylmethoxy)benzene] was synthesized by the reaction of the flexible bidentate ligand and silver nitrate. It was characterized by elemental analysis, IR spectroscopy, TG, and single‐crystal X‐ray analysis. Complex 1 is reported as the first cage‐like cluster constructed by four nitrate anions bridging two [2+2] macrocycles. A blue luminescent emission and luminescent enhancement effect are observed in complex 1 . 相似文献
3.
Behnaz Afzalian Joel T. Mague Maryam Mohamadi S. Yousef Ebrahimipour Behjat Pour amiri Esmat Tavakolinejad Kermani 《催化学报》2015,(7):1101-1108
Three complexes containing 2-pyrazinecarboxylate (pzca–), including [Ni(pzca)2(H2O)2], [Co(pzca)2(H2O)2], and [Cu(pzca)2(H2O)2], have been synthesized and characterized using physico-chemical and spectroscopic methods. Furthermore, the structure of each complex was determined by single-crystal X-ray diffraction. All three complexes have an octahedral geometry, where the metal ion chelated by two carboxylate oxygens, two nitrogen atoms belonging to pyrazinic acid molecules, and two oxygen atoms of two water molecules. The catalytic activities of these complex-es were also investigated in the green synthesis of 2H-indazolo[2,1-b]phthalazine-triones by the reaction of hydrazine hydrate with an arylaldehyde, phthalic anhydride, and dimedone in acetic acid. 相似文献
4.
Chelladurai Ganesamoorthy Maravanji S. Balakrishna 《Journal of organometallic chemistry》2007,692(16):3400-3408
The RhI, RuII, PdI and NiII complexes of the aminobis(phosphonite), PhN(P(OC6H4OMe-o)2)2 (1) are reported. The reactions of 1 with [Rh(COD)Cl]2 in 1:1 and 2:1 molar ratio afford the mono- and diolefin substituted chloro bridged chelate complexes, [(COD)Rh2(μ2-Cl)2{PhN(P(OC6H4OMe-o)2)2}] (2) and [Rh(μ2-Cl){PhN(P(OC6H4OMe-o)2)2}]2 (3), respectively. Similarly, the cationic mono- and bis-chelate complexes, [Rh(COD){PhN(P(OC6H4OMe-o)2)2}]OTf (4) and [Rh{PhN(P(OC6H4OMe-o)2)2}2]OTf (5) are obtained by treating 1 with [Rh(COD)Cl]2 in the presence of AgOTf in appropriate ratios. The dinuclear RhI carbonyl complex, [RhCl(CO){μ-PhN(P(OC6H4OMe-o)2)2}]2 (6) is prepared by treating 1 with 0.5 equiv. of [Rh(CO)2Cl]2. Reaction of 1 with cis-[NiBr2(DME)] (DME = 1,2-dimethoxyethane) affords [{PhN(P(OC6H4OMe-o)2)2}NiBr2] (7) whereas with [Ru-(η6-p-cymene)Cl2]2 in refluxing THF medium produces an interesting and rare bimetallic RuII complex, [(η6-p-cymene)Ru(μ2-Cl)3Ru{PhN(P(OC6H4OMe-o)2)2}Cl] (8). Redox condensation of the Pd0 and PdII derivatives with 1 affords the dinuclear PdI complex, [PdBr{μ-PhN(P(OC6H4OMe-o)2)2}]2 (9). The formation and structure of complexes 2-9 are assigned through various spectroscopic and micro analysis data. The molecular structures of 5 and 7-9 are confirmed by single crystal X-ray diffraction studies. 相似文献
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7.
四个含NN型双齿配体的半夹心(η^6-p-cymene)Ru(II)化合物被成功制备.这四个化合物分别为(η^6-p-cymene)-Ru(C5H4N-C5H3N-OH)(1),(η^6-p-cymene)Ru(C5H4N-CH2-C5H4N)(2),(η^6-p-cymene)Ru(C5H4N-CH2-C5H3N-OH)(3)和(η^6-p-cymene)Ru(C5H4N-CH2-C5H3N-OCH3)(4).这些化合物通过核磁氢谱、碳谱和元素分析等手段表征,化合物2的结构被X射线单晶衍射证实.将这些化合物应用于催化氨醇与酮的环化反应,其中3的催化效率最高.在0.5mol%化合物3的存在下,制备了一系列喹啉和吡啶衍生物. 相似文献
8.
CsOH-promoted epoxide ring-opening with phosphines: mild and efficient synthesis of monohydroxyphosphines 总被引:1,自引:0,他引:1
Daniel L. FoxAshlee A. Robinson James B. FrankRalph Nicholas Salvatore 《Tetrahedron letters》2003,44(41):7579-7582
A mild and convenient synthesis of monohydroxyphosphines has been achieved by epoxide ring-opening using primary or secondary phosphines in the presence of cesium hydroxide, 4 Å molecular sieves and DMF at room temperature. These reaction conditions were found to be highly regio- and stereoselective producing various monohydroxyphosphines exclusively in moderate to high yields. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(2-3):169-185
Abstract The synthesis of Ti(iso)Cl2 (iso = the dianion of 2, 2′-ethylidenebis(4, 6-di-rert-butylphenol)) is described. Metathesis reactions of this complex with Grignard reagents, as well as alkali metal salts, yielded Ti(iso)X2 (X = CH3, CH, Ph, CH2SiMe3, OCMe3, or NMe2). Reactions of the Ti-C bond in Ti(iso)(CH3)2 toward halogens, active hydrogen compounds, and acetone were studied. In addition. Ti(iso)(X)(Y) (X = CI or CH3; Y = OC6H2-2, 6-tBu2-4-Me) could be prepared with the formation of only one coordination isomer. The new complexes have been thoroughly characterized by 1H and 13C NMR spectroscopies. The solid state structure of Ti(iso)Cl2 was determined via single crystal X-ray diffraction methods. The complex is monomeric, with approximately tetrahedral geometry about the titanium ion. The structure of Ti(iso)Cl2 is compared to that of Ti(ultra)Cl2 (ultra = the dianion of 2, 2′-mefhylenebis(6-tert-butyl-4-mefhylphenol)), which was redetermined to greater precision. 相似文献
10.
Jens Rudlof Niklas Aders Dr. Jan-Hendrik Lamm Beate Neumann Dr. Hans-Georg Stammler Prof. Dr. Norbert W. Mitzel 《ChemistryOpen》2021,10(10):1020-1027
Starting from 1,2-diethynylbenzene, a series of bidentate Lewis acids was prepared by means of hydrometalations, in particular hydrosilylation, hydroboration, hydroalumination and terminal metalation based on group 13 and 14 elements. In the case of terminal alkyne metalation, the Lewis-acidic gallium function was introduced using triethylgallium under alkane elimination. A total of six different Lewis acids based on a semiflexible organic scaffold were prepared, bearing −SiClMe2, −SiCl2Me, −SiCl3, −B(C6F5)2, −AlBis2 (Bis=bis(trimethylsilyl)methyl) and −GaEt2 as the corresponding functional units. In all cases, the Lewis acid functionalisation was carried out twice and the products were obtained in good to excellent yields. In the case of the twofold gallium Lewis acid, a different structural motif in the form of a polymer-like chain was observed in the solid state. All new bidentate Lewis acids were characterised by multinuclear NMR spectroscopy, CHN analysis and X-ray diffraction experiments. 相似文献