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Palladacyclic N-heterocyclic carbene precatalysts for transition metal catalysis
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作者 Kun Wang Ruoqian Fan +1 位作者 Xian Wei Weiwei Fang 《Green Synthesis and Catalysis》 2022年第4期327-338,共12页
Palladacycles remain a challenging and significant research field in organic chemistry and have emerged as a type of powerful and versatile precatalysts or key active intermediates for transition metal catalysis.These... Palladacycles remain a challenging and significant research field in organic chemistry and have emerged as a type of powerful and versatile precatalysts or key active intermediates for transition metal catalysis.These achievements in this area are correlated to the design and development of useful ancillary ligands,such as N-heterocyclic carbenes(NHCs),which not only stabilize the actual catalytic active species facilitating the transformations,but also provide additional control over the selectivity of reactions.In this context,NHCs-ligated palladacycles(NHCP_(dcycles))with different electronic and steric properties have been synthesized and applied as green precatalysts(high stability and activity,low catalyst loading and mild reaction conditions)to accelerate transition metalcatalyzed reactions.Therefore,this review focuses mainly on the strategy of NHC-Pd_(cycles) design and catalytic results obtained from representative transition metal catalysis,such as Suzuki-Miyaura,Heck-Mizoroki and Sonogashira cross-coupling reactions,Buchwald-Hartwig amination,carbonylation as well as arylation.At last,the current limitations and potential trends for further development of NHC-Pdcycles are also highlighted. 展开更多
关键词 n-heterocyclic carbene Palladacycle Precatalyst Cross-coupling reaction Transition metal catalysis
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Chemoselective Transfer Hydrogenation of Nitroarenes with Ammonia Borane Catalyzed by Copper N-Heterocyclic Carbene Complexes
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作者 Hui Zhou Hongmei Jiao +5 位作者 Xing Lu Yuanyuan Gao Zhiqiang Ren Haojie Ma Yuqi Zhang Bo Han 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第15期1721-1726,共6页
Herein,we present a method for the homogeneous hydrogenation of nitroarenes to produce anilines using low catalyst loading(1 mo%)of copper N-heterocyclic carbene complexes as the catalyst and ammonia borane as the sou... Herein,we present a method for the homogeneous hydrogenation of nitroarenes to produce anilines using low catalyst loading(1 mo%)of copper N-heterocyclic carbene complexes as the catalyst and ammonia borane as the source of hydrogen.A wide range of nitroarenes,featuring diverse functional groups,were selectively transformed into their corresponding primary aromatic amines with high yields.This process can be readily scaled up and exhibits compatibility with various sensitive functional groups,including halogen,trifluoromethyl,aminomethyl,alkenyl,cyano,ester,amide,and hydroxyl.Notably,this catalytic methodology finds application in the synthesis of essential drug compounds.Mechanistic investigations suggest that the in-situ-generated Cu-H species may serve as active intermediates,with reduction pathways involving species such as azobenzene,1,2-diphenylhydrazine,nitrosobenzene,and N-phenylhydroxylamine. 展开更多
关键词 Homogeneous catalysis HYDROGENATION n-heterocyclic carbene complexes NITROARENES Ammonia borane
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Vanadium(V) Complexes Containing Unsymmetrical N-Heterocyclic Carbene Ligands: Highly Efficient Synthesis and Catalytic Behavior towards Ethylene/Propylene Copolymerization
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作者 Yi-Cong Wang Hui Zhat +3 位作者 Pei-Yi Cheng Shu Zhang Xiang-Wei Liu Yi-Xian Wu 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2024年第1期32-41,I0006,共11页
The highly efficient method has been developed for the synthesis of NHC·VOCl_(3) containing symmetrical or unsymmetrical Nheterocyclic carbene(NHC) ligands by the transmetallation reaction of NHC·AgCl with V... The highly efficient method has been developed for the synthesis of NHC·VOCl_(3) containing symmetrical or unsymmetrical Nheterocyclic carbene(NHC) ligands by the transmetallation reaction of NHC·AgCl with VOCl_(3).The total isolated yield of VOCl_(3)[1,3-(2,4,6-Me_(3)C_(6)H_(2))_(2)(NCH=)_(2)C:](V4') reached 86% by transmetallation reaction,which is much higher than that(48%) by direct coordination method.This methodology has also been used to synthesize the novel vanadium complexes containing unsymmetrical NHC ligands of VOCl_(3)[PhCH_(2)NCH=CHNR)C:](V5',R=2,4,6-Me_(3)C_(6)H_(2);V6',R=2,4-Me_(2)-6-Ph-C_(6)H_(2);V7',R=2,6-^(i)Pr_(2)-C_(6)H_(3)) with high yield,which could not be obtained by direct coordination method.The catalytic activity and copolymerization ability would be improved by introducing unsymmetrical NHC ligands due to their less steric bulky effect.The vanadium complex V5' containing unsymmetrical NHC ligand exhibits higher catalytic activity(3.7×10^(5)g_(copolymer)·mol^(-1) of V·h^(-1)) than that of V4' containing symmetrical NHC ligand.Moreover,the higher propylene incorporation ratio(45.6 mol%) in the copolymers of ethylene with propylene could be obtained by using V5' than that(39.9%) by using V4'.The results would provide a highly efficient strategy for the synthesis of early transition metal complexes containing versitile NHC ligands,affording the catalyst with both high catalytic activity and copolymerization ability for the synthesis of high performance polyolefin elastomers. 展开更多
关键词 Vanadium complex n-heterocyclic carbene ligand Transmetallation reaction Copolymerization of ethylene with propylene
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Controlling the solid-state luminescence of gold(I) N-heterocyclic carbene complexes through changes in the structure of molecular aggregates 被引量:2
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作者 Arruri Sathyanarayana Shin-ya Nakamura +3 位作者 Kyohei Hisano Osamu Tsutsumi Katam Srinivas Ganesan Prabusankar 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第8期957-965,共9页
Thermally stable, solid-state luminescent organic materials are highly desired for the development of practical applications.Herein we synthesized new gold(I) complexes with N-heterocyclic carbene ligands, which have ... Thermally stable, solid-state luminescent organic materials are highly desired for the development of practical applications.Herein we synthesized new gold(I) complexes with N-heterocyclic carbene ligands, which have the ability to form strong metalorganic bond. Consequently, their thermochemical stability is enhanced at temperatures around 300 °C. Precise design of the molecular structure of the ligands, with a focus on ensuring low steric hindrance around Au atoms in order to limit disturbances to Au/Au interactions, provided a complex with a densely packed crystal with a shorter intermolecular Au–Au distance(3.17 ?)than the typical distance. In the solid state, this complex exhibited strong aurophilic interactions, which generated intense phosphorescence even in air at room temperature(quantum yield=16%) in spite of absence of any phosphorescence in solution.This behavior is characteristic for solid-state luminescence referred to as aggregation-controlled emission. Furthermore, the gold(I) complex displays capacity for mechano-and vapo-chromism—that is, the ability to change color reversibly in response to the application of external stimuli. We believe that the proposed design framework, which involves controlling thermal stability and luminescence property separately, provides a new opportunity for the development of practical applications using solid-state luminescent organic molecules. 展开更多
关键词 Au complex n-heterocyclic carbene phosphorescence mechanochromism aggregation-induced emission
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Electrocatalytic hydrogen evolution from water at low overpotentials with cobalt complexes supported by redox-active bipyridyl-NHC donors
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作者 Lizhu Chen Xiaojun Su Jonah W.Jurss 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第12期3187-3194,共8页
Three cobalt complexes bearing tunable,redox-active bipyridyl N-heterocyclic carbene(NHC)-based ligands have been studied for electrocatalytic hydrogen evolution from aqueous solutions.The effect of structural modific... Three cobalt complexes bearing tunable,redox-active bipyridyl N-heterocyclic carbene(NHC)-based ligands have been studied for electrocatalytic hydrogen evolution from aqueous solutions.The effect of structural modifications to the ligand framework is investigated across the catalyst series,which includes a non-macrocyclic derivative(1-Co)and 16-(2-Co)and 15-(3-Co)membered macrocycles.A structure-activity relationship is demonstrated,in which the macrocyclic complexes have greater activity compared to their non-macrocyclic counterpart with the most rigid catalyst,supported by the 15-membered macrocycle,performing best overall.Indeed,3-Co catalyzes H2 evolution from aqueous pH 4 acetate buffer with a Faradaic efficiency of 97%at a low overpotential of 330 mV.Mechanistic studies are consistent with formation of a cobalt-hydride species that is subsequently protonated to evolve H2 via a heterolytic pathway. 展开更多
关键词 Redox-active bipyridyl n-heterocyclic carbene donors Cobalt complex ELECTROCATALYSIS Water splitting Hydrogen evolution
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Photoluminescent nickel(Ⅱ)carbene complexes with ligand-to-ligand charge-transfer excited states
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作者 Chun-Liang Hou Jia-Xi Song +1 位作者 Xiaoyong Chang Yong Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第1期357-360,共4页
While nickel(II)complexes have been widely used as catalysts for carbon-carbon coupling reactions,the exploration of their photophysical and photochemical properties is still in the infancy.Here,a series of square-pla... While nickel(II)complexes have been widely used as catalysts for carbon-carbon coupling reactions,the exploration of their photophysical and photochemical properties is still in the infancy.Here,a series of square-planar Ni(II)complexes[(diNHC)NiX2]bearing chelating benzimidazole-based bis(N-heterocyclic carbene)ligands and varying anionic coligands(1,X=Cl;2,X=Br;3,X=I)are synthesized and structurally characterized.In solid state,both 1 and 2 exhibit orange-red photoluminescence under ambient conditions.The photophysical and electrochemical measurements along with density functional theory(DFT)calculations reveal that the low-energy emissions can be attributed to singlet excited states with ligand-to-ligand charge-transfer(LLCT)character.This work suggests that strong-field N-heterocyclic carbene ligands play a crucial role to achieve the luminescence of Ni(II)complexes. 展开更多
关键词 Nickel(II)complexes n-heterocyclic carbene Luminescence Ligand-to-ligand charge-transfer character Low-lying d-d excited states
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Axially Chiral C2-Symmetric N-Heterocyclic Carbene (NHC) Palladium Complex-Catalyzed Asymmetric Fluorination and Amination of Oxindoles
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作者 张睿 王德 +2 位作者 徐琴 姜佳俊 施敏 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2012年第6期1295-1304,共10页
Chiral C2-symmetric N-heterocyclic carbene (NHC) palladium diaquo complex 5b prepared from (S)-BINAM was found to be a fairly effective catalyst for the enantioselective asymmetric fluorination of oxindoles to giv... Chiral C2-symmetric N-heterocyclic carbene (NHC) palladium diaquo complex 5b prepared from (S)-BINAM was found to be a fairly effective catalyst for the enantioselective asymmetric fluorination of oxindoles to give the corresponding products in moderate enantioselectivities along with good to excellent yields. 展开更多
关键词 chiral C2-symmetric n-heterocyclic carbene (NHC) palladium diaquo complex (S)-B1NAM asym-metric fluorination of oxindoles N-fluorobenzenesulfonimide (NFSI) 1-chloromethyl-4-fluoro-l 4-diazoniabi-cyclo[2.2.2]octane bis(tetrafluoroborate) (selectfluor)
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Synthesis and Characterization of Dinuclear Rare Earth Complexes Bearing N-heterocyclic Olefin Moieties 被引量:1
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作者 ZHANG Min SUN Jiang-Hua +1 位作者 SUN Wei-Lin NI Xu-Feng 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2020年第1期79-85,3,共8页
The oxygen-bridged dinuclear rare earth complexes(Ln=Nd(1),Y(2))bearing N-heterocyclic olefin moieties were synthesized by treating the imidazolidinium salt[SIMes-H]Br with potassium amide and rare earth bis(trimethyl... The oxygen-bridged dinuclear rare earth complexes(Ln=Nd(1),Y(2))bearing N-heterocyclic olefin moieties were synthesized by treating the imidazolidinium salt[SIMes-H]Br with potassium amide and rare earth bis(trimethylsilyl)amides.Complex 1 was characterized by X-ray diffraction analysis and complex 2 was characterized by 1H NMR spectroscopy.Both complexes were characterized by elemental analysis.Crystal data of complex 1:C74H138O2N8Si8Nd2,Mr=1685.12,orthorhombic,space group Pbca,a=25.1105(7),b=11.9188(2),c=29.6151(7)?,V=8863.4(4)?^3,Z=4,Dc=1.263 g·cm^-3,μ=1.311 mm^-1,F(000)=3544,the final R=0.0418 and wR=0.0770 for all data.The ring-opening of tetrahydrofuran molecule was proven,the possible mechanism for the formation of N-heterocyclic olefin(NHO)-rare earth complexes was speculated and the electronic and steric properties of SIMes and rare earth amides were discussed.This work provides a better understanding of N-heterocyclic carbene rare earth chemistry. 展开更多
关键词 rare earth complex n-heterocyclic OLEFIN n-heterocyclic carbene SIMes STERIC effect
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Visible-light-induced N-heterocyclic carbene mediated cascade transformation of N-alkenoxypyridinium salts
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作者 He Sheng Qiang Liu +2 位作者 Fei Chen Zhixiang Wang Xiangyu Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第9期4298-4302,共5页
While N-alkenoxypyridinium salts are widely used for the synthesis ofα-functionalized ketones via umpolung strategy,such approaches are usually limited to special nucleophiles at high temperatures.Herein,we developed... While N-alkenoxypyridinium salts are widely used for the synthesis ofα-functionalized ketones via umpolung strategy,such approaches are usually limited to special nucleophiles at high temperatures.Herein,we developed an alternative photoinduced N-heterocyclic carbene(NHC)-mediated functionalization of N-alkenoxypyridinium salts with various nucleophiles,including tetramethylammonium azide,secondary amines,aryl and alkyl thiols,and even the challenging C(sp^(3))-nucleophiles,under mild conditions.A cascade radical-radical coupling/nucleophilic substitution sequence was proposed,wherein the NHC enabled the formation of a photoactive electron donor-acceptor complex forα-iodo ketone synthesis. 展开更多
关键词 n-heterocyclic carbene N-Alkenoxypyridinium salt α-Functionalized ketones Electron donor-acceptor complex Visible light
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Synthesis and Crystal Structure of an Indenylnickel(II) NHC Complex (Ind)NiBr(1,3-bisbenzylimidazol-2-ylidene)
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作者 HU Dong-Mei SUN Hong-Mei +2 位作者 WANG Yong-Sheng SHEN Qi XUE Feng 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第10期1255-1259,共5页
The complex (Ind)NiBr(1,3-bisbenzylimidazol-2-ylidene) (Ind = indenyl) 1 has been prepared in ca. 65% yield via the reaction of (Ind)2Ni with an equivalent of 1,3-bis-benzylimidazolium bromide in THF/CH2Cl2 at... The complex (Ind)NiBr(1,3-bisbenzylimidazol-2-ylidene) (Ind = indenyl) 1 has been prepared in ca. 65% yield via the reaction of (Ind)2Ni with an equivalent of 1,3-bis-benzylimidazolium bromide in THF/CH2Cl2 at 45℃, supported by elemental analysis, NMR spectroscopy and X-ray crystal determination. The crystal belongs to the triclinic system, space group Pi with a = 7.072(1), b = 11.264(2), c = 14.541(3)°A, α = 102.21(3),β = 93.44(3),γ = 90.81(3)°, V = 1129.7(4)°A^3, Z = 2, Mr = 502.08, Dc = 1.476 g/cm^3, F(000) = 512, μ= 2.642 mm^-1, R = 0.0490 and wR = 0.1137 for 3913 observed reflections (I〉 2σ(I)). The center nickel atom is coordinated by a bromide ligand, a carbene carbon and three carbon atoms of the five-membered indenyl group to form either a highly distorted square pyramid or a highly distorted square plane. 展开更多
关键词 nickel complex indenyl ligand n-heterocyclic carbene
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Unusual selective reactivity of the rare-earth metal complexes bearing a ligand with multiple functionalities
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作者 Dongjing Hong Thayalan Rajeshkumar +5 位作者 Shan Zhu Zeming Huang Shuangliu Zhou Xiancui Zhu Laurent Maron Shaowu Wang 《Science China Chemistry》 SCIE EI CAS CSCD 2023年第1期117-126,共10页
Ligands play a key role in controlling activity of organometallic complexes so that development of new ligands to overcome the challenge is the main topic of modern chemistry.The first example of 1,1-hydride migratory... Ligands play a key role in controlling activity of organometallic complexes so that development of new ligands to overcome the challenge is the main topic of modern chemistry.The first example of 1,1-hydride migratory insertion and intramolecular redox reaction has been realized in this work by applying a new ligand in rare-earth metal chemistry.The novel rare-earth metal complexes L^(Mes)RECH2TMS(THF)(RE=Y(1a),Dy(1b),Er(1c),Yb(1d),L^(Mes)=1-(3-(2,6-iPr_(2)C_(6)H_(3)N=CH)C8H4N)-CH_(2)CH_(2)-3-(2-CH2–4,6-Me_(2)C_(6)H_(2))-(N(CH)_(2)NC),THF=tetrahydrofuran)bearing a ligand with imino,indolyl,NHC(N-heterocyclic carbene)multiple functionalities were synthesized and characterized.Treatment of complexes 1 with silanes(PhSiH3or PhSiH2Me or PhSiD3)selectively produced the unprecedented 1,1-hydride(or deuterated H)migratory insertion of the indolyl moiety of the novel unsymmetrical dinuclear rare-earth metal complexes 2.The complex 2a reacts with Ph_(2)C=O to give the selective C=O double bond insertion to the RE–Co-methylene-Mesbond product 3a which further reacts with another Ph_(2)C=O(or DMAP,4-N,N-dimethylaminopyridine)affording the novelμ-η^(2):η^(3)-dianionic 3-iminoindolyl dinuclear rare-earth metal complex 4a.The latter is formed through an unusual intramolecular redox reaction(through electron migration from the 2-carbanion of the indolyl ring to the imino motif)resulting in the re-aromatization of the indolyl ring. 展开更多
关键词 rare-earth metal complexes INDOLE n-heterocyclic carbene Fischer-type carbene 1 1-migratory insertion dianionic 3-iminoindolyl
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钌催化烯烃复分解反应的研究进展 被引量:25
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作者 李蕊琼 傅尧 +1 位作者 刘磊 郭庆祥 《有机化学》 SCIE CAS CSCD 北大核心 2004年第9期1004-1017,共14页
综述了近年来在钌催化的烯烃复分解反应领域中的研究进展 .着重介绍了该反应的各种基本类型的现状、应用和亟待解决的问题 ,并介绍了反应的机理以及催化剂的改进 .
关键词 烯烃 复分解反应 催化剂 金属卡宾络合物
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N-杂环卡宾金属配合物在酮硅氢加成反应中的应用新进展 被引量:5
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作者 厉嘉云 彭家建 +3 位作者 白赢 胡应乾 张国栋 来国桥 《有机化学》 SCIE CAS CSCD 北大核心 2009年第12期1938-1950,共13页
N-杂环卡宾是一类新型催化剂和配体,在有机化学中得到了极大的重视.N-杂环卡宾金属配合物的研究在近几年来得到迅速的发展,总结了酮硅氢加成反应中N-杂环卡宾金属配合物催化剂的应用新进展.
关键词 N-杂环卡宾金属配合物 硅氢加成 催化剂
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以N-杂环卡宾为配体的金属络合物催化有机合成的反应 被引量:11
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作者 李林涛 麻生明 《有机化学》 SCIE CAS CSCD 北大核心 2001年第1期75-81,共7页
综述了近几年来以N 杂环卡宾为配体的金属络合物催化有机合成的反应。
关键词 N-杂环 卡宾 金属络合物 催化反应 有机合成 催化剂
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烯烃复分解反应——一种制备特殊结构高分子的新途径 被引量:7
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作者 潘庆燕 赵菲 +1 位作者 庄涛 Welner Obrecht 《合成橡胶工业》 CAS CSCD 北大核心 2013年第1期74-78,共5页
综述了烯烃复分解反应的主要类型、反应机理、催化剂种类以及烯烃复分解反应在制备特殊结构高聚物中的应用。针对目前市售氢化丁腈橡胶相对分子质量高、门尼黏度大、加工困难的现状,介绍了用烯烃复分解反应制备相对分子质量可调的氢化... 综述了烯烃复分解反应的主要类型、反应机理、催化剂种类以及烯烃复分解反应在制备特殊结构高聚物中的应用。针对目前市售氢化丁腈橡胶相对分子质量高、门尼黏度大、加工困难的现状,介绍了用烯烃复分解反应制备相对分子质量可调的氢化丁腈橡胶的新技术。 展开更多
关键词 烯烃复分解反应 金属卡宾络合物 氢化丁腈橡胶 Grubbs催化剂 综述
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Stimuli-Responsive Interconversion between Poly-NHC-Based Organometallic Assemblies and Their Self-Aggregated Dimers
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作者 Guang-Feng Jin Ying-Feng Han 《Chinese Journal of Chemistry》 SCIE CAS 2024年第22期2840-2844,共5页
Poly-NHC-based organometallic assemblies 3-PF_(6),3-SbF_(6) and 3-OTf were obtained and verified by NMR spectroscopy,ESI mass spectrometry and single-crystal X-ray diffraction analyses.Controllable structural intercon... Poly-NHC-based organometallic assemblies 3-PF_(6),3-SbF_(6) and 3-OTf were obtained and verified by NMR spectroscopy,ESI mass spectrometry and single-crystal X-ray diffraction analyses.Controllable structural interconversion was observed between the poly-NHC-based organometallic assemblies and their self-aggregated dimers in solution affected by concentration,solvent and metal ion.1H NMR spectra of assembly 3-PF_(6) in CD_(3)CN at different concentrations demonstrated controllable structural interconversion,and ^(19)F NMR spectrum of assembly 3-PF_(6) at high concentration further evidenced the presence of the free hexafluorophosphate anion and encapsulated hexafluorophosphate anion for its two sets of signals.In addition,single-crystal X-ray diffraction analysis provided clear evidence that in the solid state,two assemblies 3-PF_(6) were vertically stuck,forming a self-aggregated dimer with an encapsulated hexafluorophosphate anion.Investigating the reversible structural interconversion is beneficial for revealing the intrinsic nature on the atom level and paving the way to design the stimuli-responsive functional system. 展开更多
关键词 n-heterocyclic carbene Organometallic assemblies Self-aggregated dimer Stimuli-responsive Structural interconversion Concentration Solvent metal ion
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N-杂环卡宾及其金属络合物的性质和合成方法 被引量:2
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作者 柳清湘 李正名 《化学研究与应用》 CAS CSCD 北大核心 2005年第2期147-150,208,共5页
由于N 杂环卡宾结构的多样性,以及它们的金属络合物良好的稳定性和催化活性,近年来受到了人们的广泛关注。本文对N 杂环卡宾及其金属络合物的性质和合成方法进行了综述。参考文献30篇。
关键词 N-杂环卡宾 金属络合物 性质 合成
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过渡金属正离子和卡宾配合物成键特征的理论分析 被引量:7
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作者 丁涪江 《化学学报》 SCIE CAS CSCD 北大核心 2003年第2期161-165,共5页
在 6 311G基组从头算的基础上对第一过渡系含偶数电子的金属正离子 (Sc+ ,V+ ,Mn+ ,Co+ ,Cu+ )与卡宾CH2 的配合物的成键特征进行了细致的分析 .用能级位移算符逐步降低分子片空轨道能级的方法代替分子片轨道冻结 ,使KSM能量分解的耦合... 在 6 311G基组从头算的基础上对第一过渡系含偶数电子的金属正离子 (Sc+ ,V+ ,Mn+ ,Co+ ,Cu+ )与卡宾CH2 的配合物的成键特征进行了细致的分析 .用能级位移算符逐步降低分子片空轨道能级的方法代替分子片轨道冻结 ,使KSM能量分解的耦合项得以消除 .能量分析结果表明 ,Sc+ —CH2 键是由σ供键 ,π供键与π反馈键组成的 ,不能忽略π供键 .而Cu+ —CH2 键是由σ供键与σ ,π反馈键组成的 ,不能忽略σ反馈键 .同时对VCH+ 2 ,MnCH+ 2 和CoCH+ 2 的1 A1 展开更多
关键词 过渡金属正离子 卡宾配合物 成键特征 能量分解分析 从头算 金属-碳键
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含硫和氮杂环以卡宾配位的三核铁羰基簇合物的合成与结构 被引量:1
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作者 聂峰梅 胡襄 刘树堂 《内蒙古大学学报(自然科学版)》 CAS CSCD 1989年第1期91-96,共6页
Fe_3(co)_(12)与杂环硫代酰胺SL反应.除生成Fe_2(co)_6(μ—s)_2和Fe_3(co)_9(μ_3—s)_2之外,还产生具有卡宾碳配位的新簇合物Fe_3(co)_8(μ_3—s)_2L(L=:CNH(CH_2)_2NH,:CNH(CH_2)_2S和:CNH(CH_2)_3S)Ⅰ,Ⅱ和Ⅲ,含硫和氮杂环卡宾配位... Fe_3(co)_(12)与杂环硫代酰胺SL反应.除生成Fe_2(co)_6(μ—s)_2和Fe_3(co)_9(μ_3—s)_2之外,还产生具有卡宾碳配位的新簇合物Fe_3(co)_8(μ_3—s)_2L(L=:CNH(CH_2)_2NH,:CNH(CH_2)_2S和:CNH(CH_2)_3S)Ⅰ,Ⅱ和Ⅲ,含硫和氮杂环卡宾配位的金属卡宾簇合物属首次报道。对Ⅰ—Ⅲ进行了红外。质子核磁共振和质谱的表征工作。 展开更多
关键词 羰合铁簇 卡宾配合物 杂环
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极具潜在应用价值的催化剂——N-杂环卡宾金属配合物 被引量:1
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作者 孙影 贾卫国 《化学教育》 CAS 北大核心 2009年第8期3-5,共3页
N-杂环卡宾的反应性能较高,与周期表中几乎所有的金属都能发生反应形成稳定的配合物。主要阐述了N-杂环卡宾的结构与类型,其金属配合物的合成方法及在化学反应中的催化作用和应用前景。
关键词 N-杂环卡宾 金属配合物 催化 烯烃复分解反应
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