Log in

Relevant bibliographies by topics / Alkyne complexes / Journal articles

To see the other types of publications on this topic, follow the link: Alkyne complexes.

Journal articles on the topic 'Alkyne complexes'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Alkyne complexes.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Rajapakse, Nimal, Brian R. James, and David Dolphin. "Alkyne and alkene complexes of (tetramesitylporphyrinato)ruthenium(II)." Canadian Journal of Chemistry 68, no. 12 (December 1, 1990): 2274–77. http://dx.doi.org/10.1139/v90-350.

Full text

Abstract:

The reactions of benzene or toluene solutions of RuII(TMP), where TMP is the dianion of 5,10,15,20–tetramesitylporphyrin, with some acetylenes and alkenes are reported. Acetylene yields the isolable [Ru(TMP)]2(μ-C2H2) species; while with phenylacetylene or diphenylacetylene, 1:1 π-complexes are formed. The π-complexes Ru(TMP)(C2H4) and Ru(TMP)-(C2H4)(iPrOH)•iPrOH are isolated from reactions with ethylene, and a similar cyclohexene species is characterized insitu. The findings are relevant to O2-epoxidation of alkenes catalyzed by the trans-Ru(TMP)(O)2 complex. Keywords: ruthenium, porphyrin (tetramesityl), alkene complexes, alkyne complexes.

APA, Harvard, Vancouver, ISO, and other styles

2

Wang, Li-Sheng, and Martin Cowie. "Alkyne transformations at RhMn centres. Facile conversion between parallel and perpendicular alkyne binding modes and conversions to vinyl groups." Canadian Journal of Chemistry 73, no. 7 (July 1, 1995): 1058–71. http://dx.doi.org/10.1139/v95-131.

Full text

Abstract:

The heterobinuclear complex [RhMn(CO)4(dppm)2] (1) (dppm = Ph2PCH2PPh2) reacts with alkynes (RC≡CR; R = CO2Me (DMAD), CF3 (HFB)) to yield the alkyne-bridged products [RhMn(CO)4(μ-RC2R)(dppm)2] (3a, 3b), in which the alkyne binds parallel to the metals. These species lose one carbonyl to yield two isomers in which the bridging alkyne group is either parallel or perpendicular to the Rh–Mn vector (4 or 5). Unusually facile interconversion between these two alkyne binding modes occurs. Protonation of the different alkyne-bridged species appears to occur at the metals with subsequent transfer to the alkyne ligand, yielding a series of vinyl complexes. These vinyl complexes are also obtained from the reaction of the hydride-bridged complex [RhMn(CO)4(μ-H)(dppm)2][BF4] (2) with alkynes. A related vinyl species [RhMn((CH3)C=CH2)(CO)4(dppm)2][BF4] (9a) is obtained in the reaction of 2 with allene. Also obtained in the allene reaction is the isomeric η1-allyl complex [RhMn(η1-CH2C(H)=CH2)(CO)4(dppm)2][BF4] (9b), which converts to 9a upon refluxing. The methyl analogues [RhMnCH3(CO)4(dppm)2][X] (X = SO3CF3, I) have been characterized and their structural formulations offer support for those of the vinyl species. Keywords: heterobinuclear, alkyne complexes, vinyl complexes.

APA, Harvard, Vancouver, ISO, and other styles

3

Staudaher, Nicholas D., Ryan M. Stolley, and Janis Louie. "Synthesis, mechanism of formation, and catalytic activity of Xantphos nickel π-complexes." Chem. Commun. 50, no. 98 (2014): 15577–80. http://dx.doi.org/10.1039/c4cc07590k.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Balcells, David, Odile Eisenstein, Mats Tilset, and Ainara Nova. "Coordination and insertion of alkenes and alkynes in AuIII complexes: nature of the intermediates from a computational perspective." Dalton Transactions 45, no. 13 (2016): 5504–13. http://dx.doi.org/10.1039/c5dt05014f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Ehrhorn, Henrike, Janin Schlösser, Dirk Bockfeld, and Matthias Tamm. "Efficient catalytic alkyne metathesis with a fluoroalkoxy-supported ditungsten(III) complex." Beilstein Journal of Organic Chemistry 14 (September 18, 2018): 2425–34. http://dx.doi.org/10.3762/bjoc.14.220.

Full text

Abstract:

The molybdenum and tungsten complexes M2(OR)6 (Mo2F6, M = Mo, R = C(CF3)2Me; W2F3, M = W, R = OC(CF3)Me2) were synthesized as bimetallic congeners of the highly active alkyne metathesis catalysts [MesC≡M{OC(CF3) n Me3− n }] (MoF6, M = Mo, n = 2; WF3, M = W, n = 1; Mes = 2,4,6-trimethylphenyl). The corresponding benzylidyne complex [PhC≡W{OC(CF3)Me2}] (W Ph F3) was prepared by cleaving the W≡W bond in W2F3 with 1-phenyl-1-propyne. The catalytic alkyne metathesis activity of these metal complexes was determined in the self-metathesis, ring-closing alkyne metathesis and cross-metathesis of internal and terminal alkynes, revealing an almost equally high metathesis activity for the bimetallic tungsten complex W2F3 and the alkylidyne complex W Ph F3. In contrast, Mo2F6 displayed no significant activity in alkyne metathesis.

APA, Harvard, Vancouver, ISO, and other styles

6

Levine, Daniel S., T. Don Tilley, and Richard A. Andersen. "Efficient and selective catalysis for hydrogenation and hydrosilation of alkenes and alkynes with PNP complexes of scandium and yttrium." Chem. Commun. 53, no. 87 (2017): 11881–84. http://dx.doi.org/10.1039/c7cc06417a.

Full text

Abstract:

Scandium and yttrium congeneric complexes, supported by a monoanionic PNP ligand, were studied as catalysts for alkene hydrogenation and hydrosilation and alkyne semihydrogenation and semihydrosilation.

APA, Harvard, Vancouver, ISO, and other styles

7

Alt, H. G., and H. E. Engelhardt. "Darstellung und spektroskopische Charakterisierung der Acetylenkomplexe CpV(CO)2R1C2R2 und CpV(CO)(L)R1C2R2 (Cp=η5-C5H5; R1, R2 = H, Me, Ph, SiMe3; L = PMe3tBuNC) / Preparation and Spectroscopic Characterization of the Acetylene Complexes CpV(CO)2R1C2R2 and CpV(CO)(L)R1C2R2 (Cp=η5-C5H5; R1, R2 = H, Me, Ph, SiMe3; L = PMe3tBuNC)." Zeitschrift für Naturforschung B 40, no. 9 (September 1, 1985): 1134–38. http://dx.doi.org/10.1515/znb-1985-0907.

Full text

Abstract:

The photo-induced reaction of CpV(CO)4 (1) (Cp =η5-C5H5) with alkynes R1C2R2 (R1, R2 = H, Me, Ph, SiMe3) in pentane solution yields the substitution products CpV(CO)2R1C2R2 (2). One CO ligand of complexes 2 is readily displaced by PMe3 or tBuNC affording the derivatives CpV(CO)(L)R1C2R2 {3(PMe3), 4 (tBuNC)}. Compounds 2-4 are characterized by their IR, 1H, 13C, 51V NMR and mass spectra. The alkyne in compounds 2-4 shows typical features of a four electron ligand. The barrier for the rotation of the alkyne ligand around the vanadium alkyne bond axis in the complexes 3-4 is comparatively low (⊿ G≠ = 44.4-68.3 kJ/mol) depending mainly on the steric requirements of the acetylene ligand.

APA, Harvard, Vancouver, ISO, and other styles

8

Li, Longfei, Mengxian Dong, Hua‐Jie Zhu, Bin Peng, Yaoming Xie, and Henry F. Schaefer. "Unusual η 1 ‐Coordinated Alkyne and Alkene Complexes." Chemistry – A European Journal 25, no. 68 (December 5, 2019): 15628–33. http://dx.doi.org/10.1002/chem.201903824.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Clark, George R., Alastair J. Nielson, A. David Rae, and Clifton E. F. Rickard. "The synthesis of octahedral mixed bis-alkyne and alkyne–alkene complexes of tungsten." J. Chem. Soc., Chem. Commun., no. 15 (1992): 1069–70. http://dx.doi.org/10.1039/c39920001069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Webster, Ruth. "Room Temperature Ni(II) Catalyzed Hydrophosphination and Cyclotrimerization of Alkynes." Inorganics 6, no. 4 (November 2, 2018): 120. http://dx.doi.org/10.3390/inorganics6040120.

Full text

Abstract:

The catalytic activity of nickel complexes in hydrophosphination involving secondary phosphines is not a commonly studied transformation. Beyond a small number of stand-out examples, many reports in the literature focus on the use of simple nickel salts. β-Diketiminates have been proven to be incredibly effective ligands for catalysis using a range of metal centers. This synthetic study investigates the catalytic ability of a Ni(II) β-diketiminate complex in the hydrophosphination of alkenes and alkynes, with a serendipitous discovery of its ability to effect alkyne cyclotrimerization and phosphine dehydrocoupling.

APA, Harvard, Vancouver, ISO, and other styles

11

Counsell, Andrew J., Mingfeng Yu, Mengying Shi, Angus T. Jones, James M. Batten, Peter Turner, Matthew H. Todd, and Peter J. Rutledge. "Copper(ii) complexes of N-propargyl cyclam ligands reveal a range of coordination modes and colours, and unexpected reactivity." Dalton Transactions 50, no. 11 (2021): 3931–42. http://dx.doi.org/10.1039/d0dt03736b.

Full text

Abstract:

Copper(ii) complexes of cyclam ligands with 1, 2, 3 or 4 pendant alkynes have been prepared and characterised crystallographically and spectroscopically. An unexpected hydroalkoxylation reaction is observed, affording an enol ether from the alkyne.

APA, Harvard, Vancouver, ISO, and other styles

12

Echavarren, Antonio M., María Méndez, M. P. Muñoz, C. Nevado, Belén Martín-Matute, C. Nieto-Oberhuber, and D. J. Cárdenas. "Metal cyclopropyl carbenes in the reactions of alkynes with alkenes and furans." Pure and Applied Chemistry 76, no. 3 (January 1, 2004): 453–63. http://dx.doi.org/10.1351/pac200476030453.

Full text

Abstract:

Electrophilic transition-metal complexes catalyze the reaction of enynes in the presence of water or alcohols to give hydroxy- or alkoxycyclization derivatives. The reaction proceeds by the anti addition of the alkene and the metal to the alkyne. The key intermediates in this reaction are cyclopropyl metal carbenes, which are also probably involved in the metathesis-type rearrangement of enynes. A general scheme is proposed for the cyclization of enynes initiated by the coordination of the metal to the enyne by transition metals, which included 5-exo -dig and 6-endo -dig pathways. The intramolecular reaction of furans with alkynes also proceeds via cyclopropyl metal carbenes.

APA, Harvard, Vancouver, ISO, and other styles

13

Gao, Yuan, Michael C. Jennings, and Richard J. Puddephatt. "Hydrogen transfer from formic acid to alkynes catalyzed by a diruthenium complex." Canadian Journal of Chemistry 79, no. 5-6 (May 1, 2001): 915–21. http://dx.doi.org/10.1139/v00-169.

Full text

Abstract:

The diruthenium(0) complex [Ru2(µ-CO)(CO)4(µ-dppm)2] (1) (dppm = Ph2PCH2PPh2), is a catalyst for the transfer hydrogenation, using formic acid as hydrogen donor, of the alkynes PhCºCPh, PhCºCMe, EtCºCEt, and PrCºCPr but not of the terminal alkynes HCºCH, PhCºCH, BuCºCH, or the alkynes containing one or two electron-withdrawing substituents PhCºCCO2Me and MeO2CCtriple bondCCO2Me. In the successful reactions, the formic acid is first decomposed to carbon dioxide and hydrogen, which then hydrogenates the alkynes in a slower reaction. In the unsuccessful reactions, the decomposition of formic acid is strongly retarded by the alkyne. In the case with the alkyne PhCºCH, it is shown that the alkyne reacts with protonated 1 to give first [Ru2(µ-CPh=CH2)(CO)4(µ-dppm)2][HCO2], which then isomerizes to give the catalytically inactive, stable complex [Ru2(µ-CH=CHPh)(CO)4(µ-dppm)2][HCO2]. This complex has been structurally characterized and both of the µ-styrenyl complexes are shown to be fluxional in solution.Key words: ruthenium, hydrogenation, catalysis, binuclear..

APA, Harvard, Vancouver, ISO, and other styles

14

Herrmann, Wolfgang A., Josef K. Felixberger, Josef G. Kuchler, and Eberhardt Herdtweck. "Alkin-Komplexe des Rheniums in hohen Oxidationsstufen / Alkyne Complexes of Rhenium in High Oxidation States." Zeitschrift für Naturforschung B 45, no. 6 (June 1, 1990): 876–86. http://dx.doi.org/10.1515/znb-1990-0620.

Full text

Abstract:

The class of π-alkyne complexes of metals in medium and high oxidation states has been extended by the type CH3ReO2(RC≡CR′) (3a—i). Exchange of alkyne for oxo ligands under reducing conditions has been employed as a new general synthesis. Compounds 3 are thus obtained by reaction of methyltrioxorhenium(VII) (1) with the alkynes 2a—i in the presence of a ca. 1.1-fold molar amount of polymer-bound triphenylphosphane as reducing agent (desoxygenation). The structural characterization was carried out for the example of the tolan complex 3 e by virtue of a single-crystal X-ray diffraction study at —80 °C, according to which the description of compounds 3 as “rhenacyclopropenes” seems justified. Evidence from NMR investigations of 3 a and 3 c shows that no fast rotation of the respective alkyne ligand around the axis to the metal atom occurs on the NMR time scale up to at least 105 °C. A minimal rotation barrier of approximately 20 kcal/mol is thus to be estimated. Reaction of type 3 compounds (R = R′ = CH3, b; R = R′ = C2H5, c) with polymer-bound triphenylphosphane under more drastic conditions (boiling toluene) for two days effects further reduction, with the dinuclear, diamagnetic rhenium(IV) complexes 4b and 4c, resp., being formed. Sterically demanding alkynes (e.g., R = R′ = Si(CH3)3, C6H5) seem to prevent this type of reaction. According to an X-ray diffraction study, 4b has an equilateral Re2O-triangular core geometry, with the ligands O, CH3, and butyne(2) arranged in such a way that C2-symmetry results. The alkyne complexes reported here are the first ones of tetra- and pentavalent rhenium.

APA, Harvard, Vancouver, ISO, and other styles

15

Adams, Harry, Yvonne K. Booth, Elizabeth S. Cook, Sarah Riley, and Michael J. Morris. "Reactions of Tetracyclone Molybdenum Complexes with Electrophilic Alkynes: Cyclopentadienone–Alkyne Coupling and Alkyne Coordination." Organometallics 36, no. 11 (May 31, 2017): 2254–61. http://dx.doi.org/10.1021/acs.organomet.7b00300.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Eaves, Samantha G., Dmitry S. Yufit, Brian W. Skelton, Jason M. Lynam, and Paul J. Low. "Reactions of alkynes with cis-RuCl2(dppm)2: exploring the interplay of vinylidene, alkynyl and η3-butenynyl complexes." Dalton Transactions 44, no. 48 (2015): 21016–24. http://dx.doi.org/10.1039/c5dt03844h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Stoebenau, Edward J., and Richard F. Jordan. "Alkyne and Alkene Complexes of a d0Zirconocene Aryl Cation." Journal of the American Chemical Society 126, no. 36 (September 2004): 11170–71. http://dx.doi.org/10.1021/ja045794m.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Stoebenau, Edward J., and Richard F. Jordan. "Nonchelated Alkene and Alkyne Complexes of d0Zirconocene Pentafluorophenyl Cations." Journal of the American Chemical Society 128, no. 26 (July 2006): 8638–50. http://dx.doi.org/10.1021/ja057524p.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Kataoka, Yasutaka, Kazuhiko Takai, Koichiro Oshima, and Kiitiro Utimoto. "Selective reduction of alkynes to (Z)-alkenes via niobium- or tantalum-alkyne complexes." Journal of Organic Chemistry 57, no. 5 (February 1992): 1615–18. http://dx.doi.org/10.1021/jo00031a057.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Yan, Xiaoyu, Chao Chen, and Chanjuan Xi. "Zirconoarylation of alkynes through p-chloranil-promoted reductive elimination of arylzirconates." Beilstein Journal of Organic Chemistry 10 (February 28, 2014): 528–34. http://dx.doi.org/10.3762/bjoc.10.48.

Full text

Abstract:

A novel method for the zirconoarylation of alkynes was developed. TCQ-promoted reductive elimination of arylzirconate [LiCp2ZrAr(RC≡CR)], which was prepared by the reaction of zirconocene–alkyne complexes with aryllithium compounds, afforded trisubstituted alkenylzirconocenes. This reaction can afford multi-substituted olefins with high stereoselectivity.

APA, Harvard, Vancouver, ISO, and other styles

21

HECK, R. F., G. WU, W. THAO, and A. L. RHEINGOLD. "ChemInform Abstract: Alkene and Alkyne Reactions with Cyclopalladated Organopalladium Complexes." ChemInform 22, no. 24 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199124272.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Pinkas, Jiří, Róbert Gyepes, Ivana Císařová, Jiří Kubišta, Michal Horáček, and Karel Mach. "Displacement of ethene from the decamethyltitanocene-ethene complex with internal alkynes, substituent-dependent alkyne-to-allene rearrangement, and the electronic transition relevant to the back-bonding interaction." Dalton Transactions 44, no. 16 (2015): 7276–91. http://dx.doi.org/10.1039/c5dt00351b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Stoebenau, Edward J., and Richard F. Jordan. "Nonchelated ZrIV−Alkoxide−Alkyne Complexes." Organometallics 25, no. 14 (July 2006): 3379–87. http://dx.doi.org/10.1021/om050947f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Ku, Rong-Zhi, Der-Yi Chen, Gene-Hsiang Lee, Shie-Ming Peng, and Shiuh-Tzung Liu. "Novel Alkyne Carbene Tungsten Complexes." Angewandte Chemie International Edition in English 36, no. 23 (December 15, 1997): 2631–32. http://dx.doi.org/10.1002/anie.199726311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Wu, Guangzhong, Arnold L. Rheingold, and Richard F. Heck. "Alkyne reactions with cyclopalladated complexes." Organometallics 5, no. 9 (September 1986): 1922–24. http://dx.doi.org/10.1021/om00140a036.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Schager, Frank, Werner Bonrath, Klaus-Richard Pörschke, Magnus Kessler, Carl Krüger, and Klaus Seevogel. "(R2PC2H4PR2)Pd0−1-Alkyne Complexes." Organometallics 16, no. 20 (September 1997): 4276–86. http://dx.doi.org/10.1021/om9702035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Dunn, John A., and Peter L. Pauson. "Some chiral alkyne-cobalt complexes." Journal of Organometallic Chemistry 419, no. 3 (January 1991): 383–89. http://dx.doi.org/10.1016/0022-328x(91)80250-n.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Cinellu, Maria Agostina. "ChemInform Abstract: Gold-Alkyne Complexes." ChemInform 44, no. 10 (March 5, 2013): no. http://dx.doi.org/10.1002/chin.201310217.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Berger, Josefine, Thomas Braun, Roy Herrmann, and Beatrice Braun. "Reactivity of platinum alkyne complexes towards N-fluorobenzenesulfonimide: formation of platinum compounds bearing a β-fluorovinyl ligand." Dalton Transactions 44, no. 45 (2015): 19553–65. http://dx.doi.org/10.1039/c5dt02306h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Seidel, Wolfram W., Matthias J. Meel, and Thomas Lügger. "Das Koordinationsverhalten des Acetylendisulfids Bis(benzylthio)acetylen gegenüber nullwertigen Metallkomplexen des W, Co und Pt/The Coordination Behavior of the Acetylenedisulfide Bis(benzylthio)acetylene with Zero-valent Metal Complexes of W, Co and Pt." Zeitschrift für Naturforschung B 62, no. 5 (May 1, 2007): 669–74. http://dx.doi.org/10.1515/znb-2007-0507.

Full text

Abstract:

Abstract Synthesis and characterization of the alkyne complexes [Co2(CO)6(L)], [W(CO)(L)3] and [Pt(PPh3)2(L)] with L = BnSC2SBn (Bn = benzyl) are described. X-Ray diffraction studies of [W(CO)(L)3] and [Co2(CO)5(L)]2 reveal that the donor ability of the sulfide group depends on the electronic and steric situation in the particular metal complex. The specific donor strength of sulfidesubstituted alkynes in their complexes is discussed considering the IR and NMR spectroscopic data.

APA, Harvard, Vancouver, ISO, and other styles

31

Zirngast, Michaela, Christoph Marschner, and Judith Baumgartner. "Spectroscopic and Structural Study of Some Oligosilanylalkyne Complexes of Cobalt, Molybdenum and Nickel." Molecules 24, no. 1 (January 8, 2019): 205. http://dx.doi.org/10.3390/molecules24010205.

Full text

Abstract:

Metal induced stabilization of α-carbocations is well known for cobalt- and molybdenum complexed propargyl cations. The same principle also allows access to reactivity enhancement of metal coordinated halo- and hydrosilylalkynes. In a previous study, we have shown that coordination of oligosilanylalkynes to the dicobalthexacarbonyl fragment induces striking reactivity to the oligosilanyl part. The current paper extends this set of oligosilanylalkyne complexes to a number of new dicobalthexacarbonyl complexes but also to 1,2-bis(cyclopentadienyl)tetracarbonyldimolybdenum and (dippe)Ni complexes. NMR-Spectroscopic and crystallographic analysis of the obtained complexes clearly show that the dimetallic cobalt and molybdenum complexes cause rehybridization of the alkyne carbon atoms to sp3, while in the nickel complexes one π-bond of the alkyne is retained. For the dicobalt and dimolybdenum complexes, strongly deshielded 29Si NMR resonances of the attached silicon atoms indicate enhanced reactivity, whereas the 29Si NMR shifts of the respective nickel complexes are similar to that of respective vinylsilanes.

APA, Harvard, Vancouver, ISO, and other styles

32

Das, Animesh, Chandrakanta Dash, Muhammed Yousufuddin, Mehmet Ali Celik, Gernot Frenking, and H. V. Rasika Dias. "Isolable Tris(alkyne) and Bis(alkyne) Complexes of Gold(I)." Angewandte Chemie 124, no. 16 (March 2, 2012): 4006–9. http://dx.doi.org/10.1002/ange.201200080.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Das, Animesh, Chandrakanta Dash, Muhammed Yousufuddin, Mehmet Ali Celik, Gernot Frenking, and H. V. Rasika Dias. "Isolable Tris(alkyne) and Bis(alkyne) Complexes of Gold(I)." Angewandte Chemie International Edition 51, no. 16 (March 2, 2012): 3940–43. http://dx.doi.org/10.1002/anie.201200080.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

KATAOKA, Y., K. TAKAI, K. OSHIMA, and K. UTIMOTO. "ChemInform Abstract: Selective Reduction of Alkynes to Z-Alkenes via Niobium- or Tantalum- Alkyne Complexes." ChemInform 23, no. 32 (August 21, 2010): no. http://dx.doi.org/10.1002/chin.199232102.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Alvarez, M. Angeles, M. Esther García, Daniel García-Vivó, Miguel A. Ruiz, and M. Fernanda Vega. "Insertion and C–C coupling processes in reactions of the unsaturated hydride [W2Cp2(H)(μ-PCy2)(CO)2] with alkynes." Dalton Transactions 45, no. 12 (2016): 5274–89. http://dx.doi.org/10.1039/c5dt04724b.

Full text

Abstract:

Alkyne insertion into the W–H bond invariably occurs in the title reactions, to give alkenyl complexes which may undergo further alkyne addition to yield hydrocarbyl-bridged derivatives generated from alkenyl–alkyne coupling.

APA, Harvard, Vancouver, ISO, and other styles

36

Dyer, Philip W., Vernon C. Gibson, Judith A. K. Howard, Brenda Whittle, and Claire Wilson. "Four coordinate molybdenum alkene and alkyne complexes bearing ancillary imido ligands." Polyhedron 14, no. 1 (January 1995): 103–11. http://dx.doi.org/10.1016/0277-5387(94)00336-d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Hessen, Bart, Auke Meetsma, Fre Van Bolhuis, Jan H. Teuben, Goeran Helgesson, and Susan Jagner. "Chemistry of carbon monoxide free monocyclopentadienylvanadium(I) alkene and alkyne complexes." Organometallics 9, no. 6 (June 1990): 1925–36. http://dx.doi.org/10.1021/om00156a037.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Rodewald, Dieter, Carola Schulzke, and Dieter Rehder. "Alkyne-niobium(I) complexes with functionalized alkynes: synthesis, structure and reactivity." Journal of Organometallic Chemistry 498, no. 1 (August 1995): 29–35. http://dx.doi.org/10.1016/0022-328x(95)05493-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Tubaro, Cristina, Marco Baron, Andrea Biffis, and Marino Basato. "Alkyne hydroarylation with Au N-heterocyclic carbene catalysts." Beilstein Journal of Organic Chemistry 9 (February 5, 2013): 246–53. http://dx.doi.org/10.3762/bjoc.9.29.

Full text

Abstract:

Mono- and dinuclear gold complexes with N-heterocyclic carbene (NHC) ligands have been employed as catalysts in the intermolecular hydroarylation of alkynes with simple unfunctionalised arenes. Both mono- and dinuclear gold(III) complexes were able to catalyze the reaction; however, the best results were obtained with the mononuclear gold(I) complex IPrAuCl. This complex, activated with one equivalent of silver tetrafluoroborate, exhibited under acidic conditions at room temperature much higher catalytic activity and selectivity compared to more commonly employed palladium(II) catalysts. Moreover, the complex was active, albeit to a minor extent, even under neutral conditions, and exhibited lower activity but higher selectivity compared to the previously published complex AuCl(PPh3). Preliminary results on intramolecular hydroarylations using this catalytic system indicate, however, that alkyne hydration by traces of water may become a serious competing reaction.

APA, Harvard, Vancouver, ISO, and other styles

40

Teichert, Johannes F., and Lea T. Brechmann. "Catch It If You Can: Copper-Catalyzed (Transfer) Hydrogenation Reactions and Coupling Reactions by Intercepting Reactive Intermediates Thereof." Synthesis 52, no. 17 (July 13, 2020): 2483–96. http://dx.doi.org/10.1055/s-0040-1707185.

Full text

Abstract:

The key reactive intermediate of copper(I)-catalyzed alkyne semihydrogenations is a vinylcopper(I) complex. This intermediate can be exploited as a starting point for a variety of trapping reactions. In this manner, an alkyne semihydrogenation can be turned into a dihydrogen-mediated coupling reaction. Therefore, the development of copper-catalyzed (transfer) hydrogenation reactions is closely intertwined with the corresponding reductive trapping reactions. This short review highlights and conceptualizes the results in this area so far, with H2-mediated carbon–carbon and carbon–heteroatom bond-forming reactions emerging under both a transfer hydrogenation setting as well as with the direct use of H2. In all cases, highly selective catalysts are required that give rise to atom-economic multicomponent coupling reactions with rapidly rising molecular complexity. The coupling reactions are put into perspective by presenting the corresponding (transfer) hydrogenation processes first.1 Introduction: H2-Mediated C–C Bond-Forming Reactions2 Accessing Copper(I) Hydride Complexes as Key Reagents for Coupling Reactions; Requirements for Successful Trapping Reactions 3 Homogeneous Copper-Catalyzed Transfer Hydrogenations4 Trapping of Reactive Intermediates of Alkyne Transfer Semihydrogenation Reactions: First Steps Towards Hydrogenative Alkyne Functionalizations 5 Copper(I)-Catalyzed Alkyne Semihydrogenations6 Copper(I)-Catalyzed H2-Mediated Alkyne Functionalizations; Trapping of Reactive Intermediates from Catalytic Hydrogenations6.1 A Detour: Copper(I)-Catalyzed Allylic Reductions, Catalytic Generation of Hydride Nucleophiles from H2 6.2 Trapping with Allylic Electrophiles: A Copper(I)-Catalyzed Hydroallylation Reaction of Alkynes 6.3 Trapping with Aryl Iodides7 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

41

Millini, Roberto, Horst Kisch, and Carl Krüger. "Iron Carbonyl Assisted Synthesis of 1,2-Diazepin-3-ones from Cyclic Diazenes and Alkynes." Zeitschrift für Naturforschung B 40, no. 2 (February 1, 1985): 187–92. http://dx.doi.org/10.1515/znb-1985-0208.

Full text

Abstract:

Bicyclic 1,2-diazepin-3-ones 1a-c, 2a, c are prepared by an iron carbonyl mediated reaction sequence from alkynes and cyclic 1,2-diazenes. The latter are first converted into hexacarbonyl diiron complexes which react with two molecules of an alkyne to afford tricyclic carbonyl iron compounds I -III. Oxidative degradation with bromine leads to these novel heterocycles whose structure is confirmed by an X-ray analysis of 1b.

APA, Harvard, Vancouver, ISO, and other styles

42

Mito, Shizue, and Tamotsu Takahashi. "Double carbonylation of zirconocene–alkyne complexes." Chemical Communications, no. 19 (2005): 2495. http://dx.doi.org/10.1039/b501545f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Takai, Kazuhiko, Masashi Yamada, and Kiitiro Utimoto. "Selective Cyclotrimerization of AcetylenesviaTantalum-Alkyne Complexes." Chemistry Letters 24, no. 9 (September 1995): 851–52. http://dx.doi.org/10.1246/cl.1995.851.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Calderazzo, Fausto, Christian Felten, Guido Pampaloni, and Dieter Rehder. "New alkyne complexes of niobium(I)." Journal of the Chemical Society, Dalton Transactions, no. 13 (1992): 2003. http://dx.doi.org/10.1039/dt9920002003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Lang, Heinrich, Alexander Jakob, and Bianca Milde. "Copper(I) Alkyne and Alkynide Complexes." Organometallics 31, no. 22 (September 28, 2012): 7661–93. http://dx.doi.org/10.1021/om300628g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Rashidi, Mehdi, Guy Schoettel, Jagadese J. Vittal, and Richard J. Puddephatt. "Triply bridging alkyne complexes of palladium." Organometallics 11, no. 6 (June 1992): 2224–28. http://dx.doi.org/10.1021/om00042a042.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Ohff, A., V. V. Burlakov, and U. Rosenthal. "Acetylene polymerization by titanocene alkyne complexes." Journal of Molecular Catalysis A: Chemical 108, no. 3 (May 1996): 119–23. http://dx.doi.org/10.1016/1381-1169(95)00279-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Baldridge, Kim K., Kevin D. Bunker, Carmen L. Vélez, Ryan L. Holland, Arnold L. Rheingold, Curtis E. Moore, and Joseph M. O’Connor. "Structural Characterization of (C5H5)Co(PPh3)(η2-alkyne) and (C5H5)Co(η2-alkyne) Complexes of Highly Polarized Alkynes." Organometallics 32, no. 19 (September 13, 2013): 5473–80. http://dx.doi.org/10.1021/om400749g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Salojärvi, E., A. Peuronen, R. Sillanpää, P. Damlin, H. Kivelä, and A. Lehtonen. "Aminobisphenolate supported tungsten disulphido and dithiolene complexes." Dalton Transactions 44, no. 20 (2015): 9409–16. http://dx.doi.org/10.1039/c5dt00995b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Zhao, Yanxia, Yanyan Liu, Biao Wu, and Xiao-Juan Yang. "Reactions of α-diimine-aluminum complexes with sodium alkynides: versatile structures of aluminum σ-alkynide complexes." Dalton Transactions 44, no. 30 (2015): 13671–80. http://dx.doi.org/10.1039/c5dt01693b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!