Synthesis of tetraferrocenylporphyrin and new metal complexes: Searching for reliable synthetic procedures

2016 ◽  
Vol 20 (01n04) ◽  
pp. 421-428 ◽  
Author(s):  
Martina Tiravia ◽  
Andrea Vecchi ◽  
Federica Sabuzi ◽  
Giuseppe Pomarico ◽  
Alessia Coletti ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Reaction Conditions ◽  
Synthetic Procedure

The tetraferrocenylporphyrin synthetic procedure was performed varying different reaction conditions. Mg, Mn, Pd and Cd complexes were synthesized and preliminarily studied. The results obtained show that the synthetic procedure strongly depends on catalyst, solvent and reagents concentration, even more than what observed with similar tetraarylporphyrins; concentration of substrates plays an important role in determining the outcome of the reactions.

scholarly journals A novel three-component reaction between isocyanides, alcohols or thiols and elemental sulfur: a mild, catalyst-free approach towards O-thiocarbamates and dithiocarbamates

2019 ◽  
Vol 15 ◽  
pp. 1523-1533 ◽  
Author(s):  
András György Németh ◽  
György Miklós Keserű ◽  
Péter Ábrányi-Balogh
Keyword(s):  
Elemental Sulfur ◽  
Building Blocks ◽  
Reaction Conditions ◽  
One Pot ◽  
Catalyst Free ◽  
Synthetic Procedure ◽  
Three Component Reaction ◽  
Wide Range ◽  
Organic Chemist ◽  
The One

A new multicomponent reaction has been developed between isocyanides, sulfur and alcohols or thiols under mild reaction conditions to afford O-thiocarbamates and dithiocarbamates in moderate to good yields. The one-pot reaction cascade involves the formation of an isothiocyanate intermediate, thus a catalyst-free synthesis of isothiocyanates, as valuable building blocks from isocyanides and sulfur is proposed, as well. The synthetic procedure suits the demand of a modern organic chemist, as it tolerates a wide range of functional groups, it is atom economic and easily scalable.

scholarly journals Cyclopentadienone Iron Tricarbonyl Complexes-Catalyzed Hydrogen Transfer in Water

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 421 ◽  
Author(s):  
Daouda Ndiaye ◽  
Sébastien Coufourier ◽  
Mbaye Diagne Mbaye ◽  
Sylvain Gaillard ◽  
Jean-Luc Renaud
Keyword(s):  
Metal Complexes ◽  
Hydrogen Transfer ◽  
Low Cost ◽  
Pure Water ◽  
Free Water ◽  
Water Soluble ◽  
Tricarbonyl Complex ◽  
Reaction Conditions ◽  
Catalytic Systems ◽  
Iron Tricarbonyl

The development of efficient and low-cost catalytic systems is important for the replacement of robust noble metal complexes. The synthesis and application of a stable, phosphine-free, water-soluble cyclopentadienone iron tricarbonyl complex in the reduction of polarized double bonds in pure water is reported. In the presence of cationic bifunctional iron complexes, a variety of alcohols and amines were prepared in good yields under mild reaction conditions.

Varying structural motifs in the salen based metal complexes of Co(ii), Ni(ii) and Cu(ii): synthesis, crystal structures, molecular dynamics and biological activities

2016 ◽  
Vol 45 (47) ◽  
pp. 19096-19108 ◽  
Author(s):  
Anoop Kumar Saini ◽  
Pratibha Kumari ◽  
Vinay Sharma ◽  
Pradeep Mathur ◽  
Shaikh M. Mobin
Keyword(s):  
Molecular Dynamics ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Biological Activities ◽  
Biological Applications ◽  
Reaction Conditions ◽  
Structural Motifs

Four new metal complexes which demonstrates varying structural motifs from monomeric to dimeric to tetrameric complexes by slightly altering the reaction conditions and their biological applications.

Transition metal complexes of substituted alkynes. XI. The reactions of But-2-yne and Hexafluorobut-2-yne with Dicarbonyl(η-cyclopentadieny)-cobalt and -rhodium

1974 ◽  
Vol 27 (1) ◽  
pp. 61 ◽  
Author(s):  
RS Dickson ◽  
HP Kirsch
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Major Product ◽  
Reaction Conditions ◽  
A Minor ◽  
Related Reaction

The thermally initiated reaction of hexafluorobut-2-yne and (q-C5H5)C~(C0)2 gives the 1-4-q- hexakis(trifiuoromethy1)benzene complex (7-C5H5)Co [(CF3C2CF3)3] in addition to the known cyclopentadienone complex (q-C5H5)Co [(CF3C2CF3)2CO]. The related reaction of but-2-yne with (q-CjH j)Co(CO)2 gives several compounds in addition to the cyclopentadienone complex (q-C jHj)C~- [(MeC2Me)2CO] which has been isolated previously from this reaction. Thus, the duroquinone complex (q-C5H5)Co [(MeC2Me)2(C0)2], the maleoyl complex (q-C5H5)Co(MeC2Me)(C0)3, and free duroquinone have been obtained. The yields of the various products are influenced by the reaction conditions. The metallocyclopentadiene complex (q-C jH j)2Rh2(CF3C2CF3)2, which is formed in the reaction between (q-C,H,)Rh(CO), and hexafluorobut-2-yne, exhibits fluxional behaviour in solution at c. 130". Two complexes are formed in the reaction at 100-120' between (q-C5Hj)Rh- (CO)2 and but-2-yne. These are the cyclopentadienone complex (q-C5H5)Rh [(MeC2Me)2CO] and the duroquinone complex (7-CjH5)Rh [(MeC2Me)2(C0)2]. Comparison of the various reactions indicates that: (i) a cyclopentadienone complex (q-CgH5)M- [(MeC2Me)2CO] is generally formed as major product and a duroquinone complex (q-C5Hj)M- [(MeC2Me)2(C0)2] is generally formed as a minor product in reactions between (q-C5H5)M(C0)2, M = Co and Rh, and but-2-yne; and (ii) a tetrahaptobenzene complex (q-C5H5)M [(CF3C2CF3)3] is formed as major product when M = Rh and as a minor product when M = Co in reactions between (q-C5H5)M(CO)2 and hexafluorobut-2-yne.

Gas-Phase Hydrogenation with Parahydrogen Over Immobilized Vaska’s Complex

2017 ◽  
Vol 231 (3) ◽  
Author(s):  
Ivan V. Skovpin ◽  
Vladimir V. Zhivonitko ◽  
Igor P. Prosvirin ◽  
Dzhalil F. Khabibulin ◽  
Igor V. Koptyug
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Gas Phase ◽  
Transition Metal Complexes ◽  
Iridium Complex ◽  
Nuclear Spins ◽  
Reaction Conditions ◽  
Major Drawback ◽  
Hydrogenation Catalysts ◽  
Immobilized Complexes

AbstractGenerating parahydrogen-induced polarization (PHIP) of nuclear spins with immobilized transition metal complexes as hydrogenation catalysts allows one to produce pure hyperpolarized substances, which can open new revolutionary perspectives for PHIP applications. A major drawback of immobilized complexes is their low stability under reaction conditions. In the present work we studied an immobilized iridium complex, Ir/SiO

Development of Catalytic Conversion of Nitrogen Molecule into Ammonia Using Molybdenum Complexes under Ambient Reaction Conditions

2021 ◽  
Author(s):  
Yuya Ashida ◽  
Yoshiaki Nishibayashi
Keyword(s):  
Nitrogen Fixation ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Catalytic Conversion ◽  
Nitrogen Molecule ◽  
Reaction Conditions ◽  
Molybdenum Complexes

Nitrogen fixation using homogeneous transition metal complexes under mild reaction conditions is a challenging topic in the field of chemistry. Several successful examples of the catalytic conversion of nitrogen molecule...

Triazole-annulated phthalocyanines and benzoporphyrazines

2006 ◽  
Vol 10 (11) ◽  
pp. 1309-1318
Author(s):  
Sergei I. Vagin ◽  
Michael Hanack
Keyword(s):  
Double Bond ◽  
Metal Complexes ◽  
Nickel Complex ◽  
Triazole Ring ◽  
Reaction Conditions ◽  
Terminal Double Bond

The application of mono-triazole-annulated phthalocyanine and benzoporphyrazine complexes for the functional unsymmetrical modification of the macrocycle's periphery is discussed. The peculiarities of the synthesis of some metal complexes with aryloxy-substituted mono-triazole-annulated Pc are described. Alkylation by ω-alkenylbromide of the triazole ring in accordingly prepared novel mono-triazole-annulated phthalocyaninato nickel, as well as in mono-benzotriazole-annulated porphyrazinato zinc, is studied. The terminal double bond in the formed derivatives could be successfully converted into acetylsulfanyl function only in the case of phthalocyaninato nickel complex due to the instability of porphyrazinato zinc under the reaction conditions.

Synthesis of Ferrite Nanoparticle and Ferrite-Gold Heterostructures

2010 ◽  
Vol 123-125 ◽  
pp. 251-255 ◽  
Author(s):  
Fang Hsin Lin ◽  
Reuy An Doong
Keyword(s):  
Au Nanoparticles ◽  
Reaction Conditions ◽  
Gold Nanocrystals ◽  
Size Dependent ◽  
Synthetic Procedure ◽  
Mean Size ◽  
Ferrite Nanoparticle ◽  
High Boiling Point ◽  
The Mean ◽  
Magnetite Nanocrystals

The synthesis of uniform and monodispersed magnetic and optical nanocrystals has received much attention in recent years due to the size-dependent physicochemical properties. In this study, we have demonstrated a general approach for the synthesis of size-tunable ferrite and gold nanocrystals and their nanocomposite. The monodispersed magnetite nanocrystals were obtained by thermal decomposition of iron-oleate complex in a high boiling point solvent in presence of oleylamine and oleic acid. The size of magnetite nanocrystal can be tuned from 7 – 11nm by changing the amount of iron-oleate complex. The other key parameters such as temperature, amount of capping agents, types of solvent were also discussed. This synthetic procedure could also apply to synthesis other type of ferrite nanocrystals. When Mn-acetate was partially substituted for iron-oleate in a 1:2 ratio in the same reaction conditions as in the synthesis of Fe3O4, monodispersed MnFe2O4 nanocrytals with 14nm could be obtained. Except those magnetic nanocrystals, we also synthesized various sizes of monodispersed gold nanocrystals by reducing HAuCl4 in presence of t-butylamine-borane and oleylamine. By varying the reaction temperature, the particle size could be well-tuned from 2nm to 8nm with the characteristic surface plasmon absorption between 510 and 520 nm. For Fe3O4/Au composite, it was prepared via the decomposition of iron-oleate over the surface of the Au nanoparticles. The mean size of the Fe3O4/Au nanocomposite was ∼17 nm which shows a saturation magnetization of 46.92 emu/g and absorption peak at 512nm. These composites with both magnetic and optical properties would make them very promising in the fields of biomedine and environment.

scholarly journals Iridium Catalyzed Synthesis of Tetrahydro-1H-Indoles by Dehydrogenative Condensation

Inorganics ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 97 ◽  
Author(s):  
Forberg ◽  
Kallmeier ◽  
Kempe
Keyword(s):  
Title Compound ◽  
Secondary Alcohols ◽  
Pd Catalyst ◽  
Pincer Ligand ◽  
Reaction Conditions ◽  
Iridium Catalyst ◽  
Synthetic Procedure ◽  
Reaction Proceeds ◽  
Synthetic Routes ◽  
First Time

Novel synthetic routes to the commonly encountered indole motif are highly sought after. Tetrahydro-1H-indoles were synthesized for the first time from secondary alcohols and 2aminocyclohexanol in the presence of a well-established iridium catalyst using a modified synthetic procedure recently developed for the synthesis of hydrocarbazoles. The catalyst is stabilized by an inexpensive and easy-to-synthesize triazine based PN5P pincer ligand. The reaction proceeds through acceptorless dehydrogenative condensation (ADC) and yields the title compound, dihydrogen, and water and can thus be classified as sustainable synthesis. Overall, five examples, three of which were previously unknown compounds, were prepared. The propitious isolated yields and the mild reaction conditions show the synthetic value of this approach. These tetrahydroindoles can be quantitatively dehydrogenated over a heterogeneous Pd catalyst to yield the corresponding indoles.

scholarly journals Nano-ZnO Catalyzed Multicomponent One-Pot Synthesis of Novel Spiro(indoline-pyranodioxine) Derivatives

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Harshita Sachdeva ◽  
Rekha Saroj ◽  
Diksha Dwivedi
Keyword(s):  
Microwave Irradiation ◽  
Environmentally Benign ◽  
Conventional Heating ◽  
Reusable Catalyst ◽  
Zno Nanoparticle ◽  
Reaction Conditions ◽  
One Pot ◽  
Apparent Loss ◽  
Synthetic Procedure ◽  
Three Component Reaction

A simple catalytic protocol for the synthesis of novel spiro[indoline-pyranodioxine] derivatives has been developed using ZnO nanoparticle as an efficient, green, and reusable catalyst. The derivatives are obtained in moderate to excellent yield by one-pot three-component reaction of an isatin, malononitrile/ethylcyanoacetate, and 2,2-dimethyl-1,3-dioxane-4,6-dione in absolute ethanol under conventional heating and microwave irradiation. The catalyst was recovered by filtration from the reaction mixture and reused during five consecutive runs without any apparent loss of activity for the same reaction. The mild reaction conditions and recyclability of the catalyst make it environmentally benign synthetic procedure.

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