Category: 32993-05-8

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A series of p-cymene and cyclopentadienyl Ru(II)-aNHC complexes were synthesized from 2-methylimidazolium salts with either an N-bound alkenyl (1, 3) or picolyl tether (6, 7). The C(5)-Me substituted alkenyl-tethered analogues (2, 4) were also synthesized. Ag-mediated C(2)-dealkylation was a prominent side reaction that led to the formation of normally bound NHC Ru(II) complexes, which in selected cases were isolated (5, 8). A C(4)- over C(2)-selectivity for ruthenium binding was established by protecting the C(2)-position with an iPr group on the imidazolium precursor, for which unique p-cymene (9) and cyclopentadienyl (10) Ru(II)-aNHC derivatives were synthesized. All complexes were applied in the transfer hydrogenation of ketones and in secondary alcohol oxidation, with higher catalytic activity for the p-cymene over the cyclopentadienyl systems, as well as the alkenyl- over the picolyl-containing aNHC complexes.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Electric Literature of 32993-05-8. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II). In a document type is Article, introducing its new discovery.

Cyclopentadienyl-bis(triphenylphosphine) carboxylatoruthenium(II) compounds, Ru(eta-C5H5)(PPh3)2(O2CR) have been prepared by reacting Ru(eta-C5H5)(PPh3)2Cl and AgO2CR in benzene.The 18-electron compounds are moderately stable and contain a unidentate carboxylato ligand.Cyclic voltammetry of these compounds shows the presence of a one-electron ruthenium(II)/ruthenium(III) couple near 0.6 V (vs SCE) in CH2Cl2.The half-wave potentials follow the Hammett linear free energy relationship when plotted against the ?-values of the substituents.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 32993-05-8, Application In Synthesis of Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

A family of [CpRu(PP)(MeCN)]PF6 complexes (2 a?e and 4) were prepared in which the bis-phosphine ligand contains a pendent tertiary amine in the second-coordination sphere. 2 a?e contain PPh2NR?2 ligands with two amine groups as the pendent base. Complex 4 has the PPh2NPh1 ligand with only one pendent amine. The catalytic performance of 2 a?e and 4 were assessed in the cyclization of 2-ethynyl aniline and 2-ethynylbenzyl alcohol. It was revealed that the positioning of the pendent amine near the metal active site is essential for high catalyst performance. A comparison of PPh2NR?2 catalysts (2 a?e) showed minimal difference in performance as a function of pendent amine basicity. Rather, only a threshold basicity ? in which the pendent amine was more basic than the substrate ? was required for high performance.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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The conversion of CpRuCl(PPh3)2 in boiling ethylene glycol within 90 h of reflux has been investigated.New complex cations in the form of their tetraphenylborates, for which the formulae + and + are proposed, were isolated.The former cation is also formed at lower temperatures during the reflux of CpRuCl(PPh3)2 in methanol.The following process takes place: 2CpRuCl(PPh3)2 -> + + Cl- + 2PPh3.In the presence of dicyclopentadiene during the reflux of CpRuCl(PPh3)2 in high boiling polar solvents (ethylene glycol, dimethyl sulphoxide), ruthenocene is formed in a 90 percent yield.One of the cyclopentadienyl groups in ruthenocene originates from dicyclopentadiene.As a result of the reaction of CpRuCl(PPh3)2 and NaBPh4 in a mixture of diglyme and methanol, a colourless, crystalline compound, CpRu(eta-C6H5)BPh3, is obtained in a 50-60 percent yield.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Electric Literature of 32993-05-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

The dinuclear dicationic vinylidene complex {[Ru]=C-C(Ph)CH 2C(CH2CN)=C=[Ru]}2+ (7a, [Ru] = Cp(PEt 3)2Ru) is prepared from the reaction of ICH2CN with {[Ru]=C=C(Ph)CH2C?C[Ru]}+ (6a). Deprotonation of 7a by n-Bu4NOH is followed by a cyclization process yielding the stable complex 9a, containing a five-membered carbocyclic ring ligand, which is fully characterized by 2D-NMR analysis and a single-crystal X-ray diffraction analysis. Similarly deprotonation of {[Ru]=C=C(Ph)CH2C(CH 2-COOEt)=C=[Ru]}2+ (8a) gave the stable product lia containing a bridging ligand also with a similar five-membered carbocyclic ring. The cyclization process is affected by an ancillary ligand on the Ru metal center. Thus the analogous dinuclear complex 9b, with a bistriphenylphosphine ligand on one metal, which is prepared in a similar manner from {[Ru]=C=C(Ph)CH2C(CH2CN)=C=[Ru?]}2+ (7b, [Ru?] = Cp(PPh3)2Ru), is unstable, undergoing isomerization to give the dinuclear complex 10b, containing a cyclopropenyl ligand.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Reactions between HC?CC?CSiMe3 and several ruthenium halide precursors have given the complexes Ru(C?CC?CSiMe 3)(L2) Cp? [Cp? = Cp, L = CO (1), PPh 3 (2); Cp? = Cp*, L2 = dppe (3)]. Proto-desilylation of 2 and 3 have given unsubstituted buta-1,3-diyn-1-y1 complexes Ru(C?CC?CH)(L2) Cp? [Cp? = Cp, L = PPh3 (5); Cp? = Cp*, L2 = dppe (6)]. Replacement of H in 5 or 6 with Au(PR3) groups was achieved in reactions with AuCl(PR3) in the presence of KN(SiMe3) 2 to give Ru(C?CC?CAu(PR3)}(L 2)Cp? [Cp? = Cp, L = PPh3, R = Ph (7); Cp? = Cp*, L2 = dppe, R = Ph (8), tol (9)]. The asymmetrically end-capped {Cp(Ph3P)2Ru} C?CC?C{Ru(dppe)Cp*} (10) was obtained from Ru(C?CC?CH)(dppe)Cp? and RuCl(PPh3)2Cp. Single-crystal X-ray structural determinations of 1-3 and 6-9 are reported, with a comparative determination of the structure of Fe(C?CC?CSiMe 3)(dppe)Cp? (4), and those of a fifth polymorph of {Ru(PPh 3)2Cp}2(muC?CC?C) (12), and {Ru(dppe)Cp}2(mu-C?CC?C) (13).

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Treatment of 1 and 2 with <(RhCl(CO)2)2> leads to the immediate formation of the heterobimetallic complexes <(C5H5)Ru(mu-CO)2(mu-L2)(RhCl2> (L2 = dppen 3 or dppm 4) in high yield.The structure of complexes 1 and 3 have been determined by X-ray diffraction.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 32993-05-8, Application In Synthesis of Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Ruthenium complexes [(eta5-C5H5) Ru(PPh3)(kappa2-paa)]PF6 (paa = pyridine-2-carbaldehyde azine) and [(eta5-C5H 5)Ru(kappa1-dppm)-(kappa2-paa)]BF 4 [dppm = bis(diphenylphosphanyl)methane] have been employed as a synthon in the synthesis of homo/hetero bi-/trimetallic complexes. It is the uncoordinated N,N-donor site on paa in complex [(eta5-C 5H5)Ru(PPh3)-(kappa2-paa)]PF 6, and N,N-donor site on paa and pendant phosphorus in [(eta5-C5H5)Ru(kappa1-dppm) (kappa2-paa)]BF4 that allows for their incorporation into bi-/trimetallic systems. The resulting complexes have been characterized by analytical, spectral and electrochemical studies. Molecular structures of homobimetallic complex [(PPh3)(theta5-C 5H5)Ru(mu-paa)Ru(theta6-C 10H14)Cl](PF6)2 and hetero-bimetallic complex [(PPh3)(theta5-C 5H5)-Ru(mu-paa)Rh(theta5-C 5Me5)Cl](PF6)2 have been authenticated crystallographically. Complexes exhibit absorptions throughout the visible region and complicated electrochemical behaviour. Metal-based Ru II/RuIII oxidations in the bimetallic complexes do not vary as in the trimetallic complexes. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a Article，once mentioned of 32993-05-8, Recommanded Product: Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II)

Ruthenium-sulfur dioxide complexes Cl ((PR3)2 = (PPh3)2, Ph2PCH2PPh2(dppm), Ph2PC2H4PPh2(dppe)) add alkoxide to give sulfito complexes (R’= Me, Et, iPr).Reactions of Cl with LiR’ (R’= Me, Bu, Ph), MgBrR'(R’= Et, CH=CH2) or ZnEt2 give sulfinato complexes .The structure of was determined by X-ray crystallography: Crystals are triclinic, space group P1/, a = 11.008(1), b = 15.998(6), c = 17.813(2) Angstroem, alpha = 92.30(2), beta = 93.916(8), gamma = 107.54(2) degree, Z = 4.Salient features are a short Ru-S bond and relatively long S-O bonds which attest to the high ?-donor ability of the pseudo-tetrahedral metal fragment.Key words: Ruthenium Sulfur Dioxide Complexes, Nucleophilic Addition, Sulfinato Complex Structure

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Recommanded Product: Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II). In my other articles, you can also check out more blogs about 32993-05-8

Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Application of 32993-05-8, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 32993-05-8, C41H35ClP2Ru. A document type is Article, introducing its new discovery.

A series of RuCp[OC6H3(CH2CH=CH 2-2)(R)](PPh3)n complexes (n = 2, R = H (1a); n = 1, R = 4-OMe (2b), 4-Me (2c), 4-Ph (2d), 4-Br (2e), 4-NO2 (2f), 6-OMe (2g), 6-Me (2h), 6-Ph (2i)) have been prepared in 27-76% yields. These 2-allylaryloxo complexes 1a and 2b-f are in equilibrium between RuCp[OC6H 3(CH2CH=CH2-2)(R)-kappa1O] (PPh3)2 (1) and RuCp[OC6H3(CH 2CH=CH2-2)(R)-kappa1O,nu2C, C?](PPh3) (2) in solution, and 2g-i do not react with PPh 3. The equilibrium constant K1 (K1 = [2][PPh3]/[1]) is about the same for 1a and 2b-f (K1 = 0.07-0.31 M). In contrast to the conventional aryloxo complexes of the late transition metals, treatment of 1a and 2a-g with weak Bronsted acids (HOR) gives a rapid equilibrium with 2HOR. The association constant K2 (K 2 = [2HOR]/([2][HOR])) increases on decreasing the pKa value of the acid employed and on increasing the induction effect of substituents at the 4-position in the aryloxo group. These features suggest present association being regarded as a simple acid-base interaction. Interestingly, further association of 2HOR with the second acid leads to the cleavage of the benzylic C-H bond, giving RuCp[C3H 4{1-C6H3(OH-2)(R)}-nu3C,C?, C?](PPh3) (3). The thermodynamic and kinetic studies suggest formation of hydrogen bonds among two Bronsted acid molecules, lone-pair electrons in the aryloxo oxygen, and a benzylic methylene proton. Such association makes the Ru(II) center more electrophilic to attack the benzylic carbon to give 3.

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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI