Document Type: Article All Authors / Contributors: Lund C.L.; Sgro M.J.; Cariou R.; Stephan D.W. ISSN:0276-7333 Language Note: English Unique Identifier: 778501889 Awards:
| Title | : | A cis-bis-mixed-carbene ruthenium hydride complex: An olefin-selective hydrogenation catalyst |
| Author | : | Lund C.L.; Sgro M.J.; Cariou R.; Stephan D.W. |
| Language | : | en |
| Rating | : | 4.90 out of 5 stars |
| Type | : | PDF, ePub, Kindle |
| Uploaded | : | Apr 12, 2021 |
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Dichlorotris(triphenylphosphine)ruthenium(ii) serves as a precatalyst for the hydrogenation of alkenes, nitro compounds, ketones, carboxylic acids, and imines. On the other hand, it catalyzes the oxidation of alkanes to tertiary alcohols, amides to t-butyldioxyamides, and tertiary amines to α-(t-butyldioxyamides) using tert-butyl hydroperoxide.
A cis-bis-mixed-carbene ruthenium hydride complex: an olefin-selective hydrogenation catalyst (pph3)3 to give ruclh(iome)(pph3)2 (2), which reacts further with simes to give the cis-bis-mixed.
A series of mixed ligand ruthenium(ii) complexes [ru(pdto)(diimine)](clo 4) 2 /(pf 6) 2 1–3 and [ru(bbdo)(diimine)](clo 4) 2 4–6, where pdto is 1,8-bis(pyrid-2-yl)-3,6-dithiooctane, bbdo is 1,8-bis(benzimidazol-2-yl)-3,6-dithiooctane and diimine is 1,10-phenanthroline (phen), dipyrido-[3,2-d:2′,3′-f]-quinoxaline (dpq) and dipyrido[3,2-a:2′,3′-c]phenazine (dppz), have been isolated.
A cis-bis-mixed-carbene ruthenium hydride complex: an olefin-selective hydrogenation catalyst.
Three ruthenium(ii) complexes with n-heterocyclic carbene a cis-bis-mixed-carbene ruthenium hydride complex: an olefin-selective hydrogenation catalyst.
May 19, 2015 a series of electron-rich second-generation cis-dichloro ruthenium aldehyde- chelating disclosed (spy-5-31) dichloro(2-formylbenzylidene-κ2(c,o))(1,3-bis( 2,4 characteristic 1h nmr signals comprised the carbene'.
They were combined with [rucl 2 (p‐cymene)] 2 and potassium tert‐butoxide or sodium hydride to generate the corresponding ruthenium‐n‐heterocyclic carbene complexes in situ. Catalyst precursors derived from imidazol(in)ium salts bearing the 2,4,6‐trimethylphenyl (mesityl) and the 2,6‐diisopropylphenyl groups were also prepared.
Stephan, reactions of carbene stabilized a cis-bis-mixed carbene ruthenium hydride complex: a selective olefin.
Reaction of cis-[ru(κ2-oac)2(pipr3)2] 1b with phenyl propargyl ether 194 figure 1-11 ruthenium carbene catalysts used for enyne metathesis of a carboxylic acid to an alkyne.
Ruthenium-thiolate-alkylidene complexes: synthesis and activity in a cis-bis-mixed carbene ruthenium hydride complex: a selective olefin hydrogenation.
During recent years impressive progress has been made in the development of homogeneous olefin metathesis catalysts. 1 this has mainly been due to the synthesis of new ruthenium carbene catalysts, such as ru( chph)-(cl) 2 (pcy 3 ) 2 (1) 2 and ru( chph)(cl) 2 (pcy 3 )l (where l is an n-heterocyclic carbene ligand). 3 immobilisation of these catalysts on solid supports will facilitate the workup.
Ruthenium-based olefin metathesis catalysts coordinated with unsymmetrical n-heterocyclic carbene ligands: synthesis, structure, and catalytic activity. Chemistry, 14(25):7545-7556, 01 jan 2008 cited by: 18 articles pmid: 18637651.
Hee-jun park, wooyul kim, wonyong choi and young keun chung, ruthenium(ii) complexes incorporating the bidentate ligand containing an imidazolium moiety: synthesis, characterization, and electrochemical properties and their application in a visible-light induced hydrogen-evolving system, new journal of chemistry, 37, 10, (3174), (2013).
A persistent carbene is a type of carbene demonstrating particular stability. The best-known in bis(diisopropylamino)cyclopropenylidene, which is stable at room of mixed carbene-phosphine complexes, which undergo trans-cis- isomer.
5 synthesis of bis-trimethylsilyl-cyclopentadienone ru(nhc) ruthenium hydroxycyclopentadienyl n-heterocyclic carbene complexes as transfer under mixing the organic phase was extracted with ch2cl2 then concentrated under.
Two new bis-imidazolinium salts (4a, 4b) have been synthesized as precursors of n-heterocyclic carbenes (nhcs) from the commercially available (r)-2,2′-dihydroxy-1,1′-binaphthalene. The two bis-imidazolinium salts were used as efficient precursor of nhc ancillary ligands in the palladium-catalyzed heck reaction. Good to excellent yields and high stereoselectivities were obtained with ethyl.
Oct 26, 2012 alkene addition of carbene to cis 2 butene lecture.
Neutral dihydride 2 displays a tetragonal bipyramidal geometry with four carbene groups coordinated to ruthenium in equatorial positions and two apical hydrogen atoms.
In addition, ruthenium(ii) complexes were also characterized using ftir and uv-vis spectroscopy to support the formation of ruthenium(ii) complexes. 31p nmr spectroscopic study on ruthenium(ii) complexes suggested that there are three isomers present after the complexation reaction and all the ruthenium complexes demonstrate octahedral geometry.
Nhc–ru complexes-friendly catalytic tools for manifold chemical transformations: 07ccr765. N-heterocyclic carbene–silver complexes as a new class of antibiotics: 07ccr884. Organosilicon derivatives of nitrogen heterocycles with hypervalent silicon atom: 07uk885.
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Cis-dichlorobis(bipyridine)ruthenium(ii) is the coordination complex with the formula rucl 2 (bipy) 2, where bipy is 2,2'-bipyridine. It is a dark green diamagnetic solid that is a precursor to many other complexes of ruthenium, mainly by substitution of the two chloride ligands.
Photophysics of bis-bipyridyl nitro complexes of ruthenium(ii) with pyridine ligands: substituent effects.
Carbene dimerization is a type of organic reaction in which two carbene or carbenoid precursors react in a formal dimerization to an alkene. This reaction is often considered an unwanted side-reaction but it is also investigated as a synthetic tool.
The tetrakis-nhc complex, [ru(ime4)4h2] (1), proved to be a remarkably the cis-dihydride [ru(dpephos)2h2] (33) to give [ru(dpephos)(ph2pc6h4o)h] (34) ime2) and the mixed carbene-phosphine species [ru(nhc)2(pph3)2h2] and bis[.
The isomerization of cis- and trans-dichloro ruthenium carbene mixed n- heterocyclic carbene/phosphite ruthenium complexes: the effect of a bulkier nhc metathesis catalysts: the reactivity of a bis-ylidene ruthenium complex.
Three ruthenium(ii) carbonyl complexes with a bistriazole-2-ylidene (bitz) ligand have been prepared and characterized. The molecular structures were determined by single-crystal x-ray diffraction, which exhibit the six-coordinate distorted octahedral geometry with two carbene carbon atoms, two carbonyl groups, and two halide atoms.
Leong controlling the coordination modes of pyridyl-functionalized n-heterocyclic dicarbene ligands organometallics 2020, 39, asap. 0c00587 five palladium(ii) complexes bearing potentially tetradentate pyridine-functionalized dinhc ligands with flexible linkers.
1 synthesis of vinyl chloride monomer by acetylene hydrochlorination with a ruthenium-based n-heterocyclic carbene complex catalyst ming cai,a haiyang zhang,*a baochang man,a jian li,a linfeng li,a yanqin li,a dongyang xie,a renpan.
Di-tetrabutylammonium cis-bis(isothiocyanato)bis(2,2′-bipyridyl-4,4′- dicarboxylato)ruthenium(ii) 95% (nmr); cas number: 207347-46-4; synonym: n -719.
Novel complexes 1 and 2 based on n-heterocyclic carbenes, which are a cis- bis-mixed-carbene ruthenium hydride complex: an olefin-selective.
Facile synthesis of a ruthenium carbene complex with a cis-chelating chph (1) with bis(di-t-butylphosphino)ethane (dtbpe) as a cis-chelating ligand is easily.
Of octavinylsilsesquioxane hybrid nanocomposite with ruthenium key words: cross metathesis, octavinylsilsesquioxane, ruthenium carbene, nanocomposite.
The n-heterocyclic carbene c3h2n2 (ch2ch2ome)2 (1; iome) reacts with ruhcl (pph3)3 to give ruclh (iome) (pph3)2 (2), which reacts further with simes to give the cis-bis-mixed-carbene complex ruclh.
Reactivities involving ruthenium bis(imino)pyridine complexes have been the large amount of orbital mixing can allow for states of higher multiplicity to be cis to each other with exactly one in the plane of the [n3] ligand, eithe.
Ruthenium olefin metathesis catalysts are one of the most commonly used interestingly, similar pretreatment with cis-2-butene had little effect on the catalyst activity. Both the 1st and 2nd generation precatalyst provided bis-pyr.
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