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ComplexesAlkenes and AlkynesSynthesisLigandAlkanesLigandsAlkeneSphereChemistryHomogeneousCycloadditionCatalystsPolymersAldehydesCATALYSISAffordsReactionCyclisationCompoundsIntermolecularTerminalIsomerismSubstratesStructuresReactionsChiralCatalystTransition metalComplexCalculationsActivationImportantMadeRingsDevelopment
Complexes8
  • In terms of mechanism, the reactions begin with the formation of metal-alkyne complexes. (wikipedia.org)
  • My research interests lie with organometallic and coordination chemistry, in particular the stabilisation of main group and transition metal complexes with unusual oxidation states and bonding modes. (nottingham.ac.uk)
  • Among transition metal compounds, this work deals with organotransition metal complexes of two-carbon (C2) p-ligands, i. e. , alkene and alkyne complexes. (uab.cat)
  • The aim of this work is to study some representative examples of the chemistry of alkene and alkyne complexes and show how computational chemistry methods can be applied to solve real problems for which the theoretical chemist can significantly contribute to find an answer. (uab.cat)
  • The reaction of 1 with 1,2,3-triazole gives a 1:1 mixture of the bistriazolato complexes [(eta(6)-C6Me6)(2)Ru-2(mu(2)-H)(mu(2)-eta(1),eta(1)-N3C2H2)(2)](+) with parallel (7a) and anti-parallel (7b) coordination of the triazolato ligands. (unine.ch)
  • Conformationally flexible N4 ligand and its coordination in metal complexes. (oist.jp)
  • The Co and Fe complexes were catalytically active in hydrogenation of alkenes and alkynes. (oist.jp)
  • While studying coordination chemistry of naphthyridines with transition metal complexes, we found that even simple subsituted naphthyridines can stabilize unusual nickel(III) complexes formed by aerobic oxidation. (oist.jp)
Alkenes and Alkynes1
  • Interaction of Ammonia Monooxygenase from Nitrosomonas europaea with Alkanes, Alkenes, and Alkynes. (ncsu.edu)
Synthesis5
  • A CuI-catalyzed synthesis of 1,3-disubstituted allenes from 1-alkynes by the reaction with various N -tosylhydrazones as readily available starting materials is operationally simple and gives the desired products in good yields. (organic-chemistry.org)
  • 1,2,3,4-tetrahydroisoquinoline (THIQ) mediates a practical synthesis of 1,3-disubstituted allenes from terminal alkynes and aldehydes under mild conditions in the presence of CuBr first and then ZnI 2 . (organic-chemistry.org)
  • ZnI 2 is a catalyst for a one-step synthesis of allenes from terminal alkynes and both aromatic and aliphatic aldehydes with morpholine as the base in toluene. (organic-chemistry.org)
  • Researcher within the topic: "Phosphinoferrocene Carboxamides: Synthesis and Coordination to transition metal of group 10. (weebly.com)
  • Insertion of carbon fragments into P(III)-N bonds in aminophosphines and aminobis(phosphines): synthesis, reactivity, and coordination chemistry of resulting phosphine oxide derivatives. (unboundmedicine.com)
Ligand7
  • An efficient protocol for the palladium-catalyzed Heck alkynylation using XPhos as ligand and Cs 2 CO 3 as the base, couples a wide range of functionalized terminal alkynes and substituted benzyl chlorides. (organic-chemistry.org)
  • A well-designed, electron deficient, and sterically hindered amide-type NN 2 pincer ligand was crucial to the success of a general, efficient, and practical nickel-catalyzed deaminative allenylation of amino acid derivatives with terminal alkynes under mild conditions. (organic-chemistry.org)
  • The first one presents a study of the nature of the bonding of alkyne as a two- or four-electron donor ligand. (uab.cat)
  • While the single-crystal X-ray structure analyses of 1, 2 and 3 show the expected mu (2)-eta (2) coordination of the diphosphine ligands, that of 4 reveals an unusual structure with one mu (2)-eta (2)-diphosphine and one mu (1)-eta (2)-diphosphine ligand. (unine.ch)
  • R' = Bu ") in which the vinyl ligand has opened a Ru-Ru bond upon coordination the Ru-3 framework. (unine.ch)
  • Precatalyst initiation involves the coupling of one equivalent of the substrate with the reactive 16e intermediate thermally generated by the precatalyst (i.e., an alkylidene by 1 or an eta(2)-alkyne complex by 2), followed by rearrangement of the coupled ligand in the metal's coordination sphere either to an olefin or to a diene (with concomitant loss of two hydrogen atoms). (ubc.ca)
  • For this purpose, we utilize conformationally flexible ligands such as N4-pyridinophane that is known to change their coordination mode to a metal in response to pH changes, redox reactions, temperature or subtle changes in ligand steric properties (Scheme 1). (oist.jp)
Alkanes1
  • Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes and alkynes), difference between saturated hydro carbons and unsaturated hydrocarbons. (jagranjosh.com)
Ligands1
  • A MOM (metal-organic material) is a coordination-driven assembly constructed from metal nodes linked by organic ligands. (rsc.org)
Alkene1
  • The intramolecular [5 + 2] cycloaddition of VCP with alkenes shown in eq. 2 [12] is a much more challenging and also complex process since the alkene is less reactive than alkyne and diastereoselectivity also becomes an issue. (degruyter.com)
Sphere2
  • The combination of two alkynes within the coordination sphere affords a metallacyclopentadiene. (wikipedia.org)
  • In the second, an important aspect of alkyne reactivity, the alkyne-vinylidene isomerization, has been investigated on the coordination sphere of niobocene. (uab.cat)
Chemistry4
  • Organic /Chemical Bonding / Inorganic / Stereo Chemistry / Coordination Compounds Models can be made using colored atoms, Flexible & Rigid Connectors For Ex. (edunovate.in)
  • 260. [Book chapter] A Branch of Zintl Chemistry: Metal Clusters of Group 15 Elements Yu-He Xu, Nikolay V. Tkachenko, Alvaro Muñoz-Castro, Alexander I. Boldyrev, and Zhong-Ming Sun. Atomically Precise Nanochemistry, Editor(s):Rongchao Jin, De-en Jiang. (amclab.cl)
  • The 2006 International Conference on Coordination Chemistry (ICCC) took place, for the first time, on African soil, between the 13th and 18th August 2006 in the beautiful city of Cape Town, South Africa ( 1 ). (matthey.com)
  • it was apparent that in these, coordination chemistry is alive and thriving. (matthey.com)
Homogeneous1
  • Our main goal is to the design and utilization of organometallic and coordination compounds in homogeneous catalysis, small molecule activation and in stimuli-responsive materials design. (oist.jp)
Cycloaddition5
  • An alkyne trimerisation is a [2+2+2] cycloaddition reaction in which three alkyne units (C≡C) react to form a benzene ring. (wikipedia.org)
  • The [5 + 2] cycloaddition is one of the most efficient ways to access seven-membered rings since the two-carbon components (alkenes, alkynes, or allenes) are readily available. (degruyter.com)
  • Prior to our study, however, there was only one type of transition-metal-catalyzed [5 + 2] cycloaddition: the reaction between vinylcyclopropanes and alkenes, alkynes, or allenes. (degruyter.com)
  • Monocyclic seven-membered rings were synthesized by intermolecular [5 + 2] cycloaddition of ACEs and alkynes. (degruyter.com)
  • In 1995 Wender and his co-workers reported the first transition-metal-catalyzed [5 + 2] cycloaddition between VCP and a tethered alkyne as shown in eq. 1 ( Scheme 1 ) [7]. (degruyter.com)
Catalysts2
  • The cotrimerization of alkynes and nitriles in the presence of organocobalt catalysts has been commercialized for the production of substituted pyridines. (wikipedia.org)
  • Research grantee within the Project: "Catalysts for alkynes cyclization", supported by the FCT project PPCDT/QUI/58119/2004. (weebly.com)
Polymers1
  • In addition to high-order polymers and dimers and trimers, which originate from low regio- and chemoselectivities, enyne side products derived from alkyne dimerisation have been observed. (wikipedia.org)
Aldehydes1
CATALYSIS1
Affords1
  • Cyclisation carried out with a diyne and a separate alkyne affords greater control. (wikipedia.org)
Reaction4
  • Alkyne trimerization is of no practical value, although the reaction was highly influential. (wikipedia.org)
  • The reaction of 1-alkynes with Cy 2 NH and paraformaldehyde mediated by CuI (0.5 equiv) in refluxing dioxane produces terminal allenes in much higher yields than previously reported protocols and many functional groups such as mesylate, hydroxyl group, ether, amide, etc. are tolerated. (organic-chemistry.org)
  • In the case of diphenylacetylene, reaction with two equivalents of the alkyne, yields the vinyl-alkyne cluster (mu(2)-H)Ru-3(CO)(6)(mu(2)-eta(1),eta(2)-PhC=CHPh)(mu(3)-eta(1),eta(2)-P hC=CPh)[mu(3)-eta(1),eta(2)-NS(O)Me(C6H4)] (5) with ortho-metallation of the phenyl substituent of the sulfoximido cap. (unine.ch)
  • The reaction proceeds with 5- endo-dig regioselectivity with a variety of phenols functionalized at the arene and alkyne moieties in high yields using InI 3 (5 mol%) in DCE. (syncatmeth.es)
Cyclisation1
Compounds1
  • We are interested in creating new stimuli-responsive and, in particular, mechanoresponsive materials that utilize coordination compounds to induce desired changes in properties (such as color, luminescence, shape, conductivity) in response to external stimulus such as mechanical activation, light, pH changes or oxidation/reduction. (oist.jp)
Intermolecular3
  • Regioselective intermolecular trimerization of unsymmetrical alkynes remains an unsolved problem. (wikipedia.org)
  • Our recent progress on Rh-catalyzed intra- and intermolecular [5 + 2] cycloadditions of ACEs and alkynes is summarized in this article. (degruyter.com)
  • The DFT studies favored the 4-ethynyltoluene (HC≡CPhMe) coordination pathway over the p-toluenesulfonyl hydrazide (NH 2 NHSO 2 C 6 H 4 CH 3 ) coordination pathway, and that proceeded by a crucial intermolecular hydrazide-assisted proton transfer step. (tau.ac.il)
Terminal1
  • The electron-deficient cluster (mu(2)-H)Ru-3(CO)(9)[mu(3)-NS(O)MePh] (1) reacts with the terminal alkyne PhCH2C=CH to give the vinyl complex Ru-3(mu(2)-CO)(2)(CO)(6)[mu(3)-NS(O)MePh](mu(2)-eta(1),eta(2)-PhCH2C=CH2 ) (2). (unine.ch)
Isomerism1
Substrates1
  • Cyclization involving substrates in which some or all of the alkyne units are tethered together can provide fused ring systems. (wikipedia.org)
Structures1
  • papers and proteins from whole approaches can run confirmed by solving projects in a CategoriesWriting and Looking for compound-specific motors, successfully part pitfalls, structures and suitable alkynes that have DocumentsCapillary angstroms. (private-art.com)
Reactions2
  • Addition of a 1,5-diyne with an alkyne produces a benzocyclobutene, a strained structure that can then be induced to undergo further reactions. (wikipedia.org)
  • Mechanistic Studies of Formal Thioboration Reactions of Alkynes. (tamu.edu)
Chiral1
  • Coordination of the cyclopropane with the chiral catalyst generates the visible-light-absorbing complex, lowers the reduction potential of the cyclopropane, and provides the asymmetric induction and overall stereocontrol. (uni-marburg.de)
Catalyst1
  • Steric bulk on the alkyne coupling partners and catalyst have been invoked as the controlling elements of regioselectivity. (wikipedia.org)
Transition metal1
  • This is best illustrated by the transition-metal-catalyzed [5 + 2] cycloadditions of vinylcyclopropane (VCP) with alkynes, alkenes, and allenes ( Scheme 1 ). (degruyter.com)
Complex1
  • Structure of the coordination complex NbCl3(dimethoxyethane)(3-hexyne). (hollandmedia.net)
Calculations4
  • Density functional theory calculations show that σ donation from alkyne → Au dominates over the Au → alkyne π back-donation. (hollandmedia.net)
  • DFT calculations showed that, despite their stark electronic differences, both the B≡N and B≡B triple bonds activate acetone via a similar coordination-deprotonation mechansim. (uni-wuerzburg.de)
  • DFT calculations suggest that dimer In 2 I 6 is the catalytic species through a novel double coordination with the alkyne and the hydroxyl group. (syncatmeth.es)
  • Molecular mechanics/dynamics calculations reveal that the geometries of these metal centers force the alkyne termini to a wide range of distances (3.85−4.20 Å), thereby accounting for the variability in Bergman cyclization temperatures. (figshare.com)
Activation1
  • Experimental and computational studies support a mechanism based on the indium(III) p-Lewis acid activation of the alkyne followed by nucleophilic addition of the phenol and final protodemetalation to afford the corresponding benzo[ b ]furan. (syncatmeth.es)
Important2
  • A més a més, juguen un paper important com a econòmiques matèries primeres en processos industrials, així com a materials de partida per la síntesi orgànica. (uab.cat)
  • En el segon, s'estudia un aspecte important de la reactivitat dels alquins, la isomerització alquí-vinilidè, la qual ha estat investigada en l'esfera de coordinació del niobi. (uab.cat)
Made1
  • Bath pull a thorough coordinations, I made-up identifying my half-conquered carcinosarcomata grommets unless overplied lentos. (ibertren.es)
Rings1
  • All three alkyne units can be tethered, leading to creation of three rings in a single step, with each of the two additional ring sizes controlled by the respective tether lengths. (wikipedia.org)
Development1
  • Perhaps the most useful development in this area, at least from the commercial perspective is the cotrimerization of nitriles and alkynes. (wikipedia.org)