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Reference of 32993-05-8, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.32993-05-8, Name is Chlorocyclopentadienylbis(triphenylphosphine)ruthenium(II), molecular formula is C41H35ClP2Ru. In a patent, introducing its new discovery.

A series of cyclopentadienyl and pentamethylcyclopentadienyl complexes of cobalt, rhodium, iridium, ruthenium and chromium with alpha-amino-acid esters (L) as ligands was prepared and characterized: Cp*(Cl)2M(L) (1, 2: M = Rh, Ir), Cp(I)2Co(L) (4), [Cp(Ph3P)2Ru(L)]+BF-4 (6), [Cp(OC)(Ph3P)Ru]+BF-4 (7) and the paramagnetic compounds Cp*(Cl)2Ru(L) (8) and Cp(Br)2Cr(L) (9). AlaOMe and HisOMe form N,O and N,N chelate complexes [Cp*(Cl)M(alaOMe)]+BF-4 (3: M = Rh, Ir), [Cp(I)Co(hisOMe)]+BF4. Cp*Co(CO)I2 and GlyOMe gave the N,O-dipeptide ester complex Cp*(I)Co(glyglyOMe)]+BF-4 (5). The crystal structures of Cp(I)2Co(glyOEt) and Cp*(Cl)2Ru(alaOMe) were determined by X-ray diffraction. The complexes 1 and 2 undergo ester exchange reactions with CD3OD. [Cp*MCl2l2 (M = Rh, Ir) catalyze the exchange of the ethoxy group in Me2NCH2CO2Et by CD3OD.

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

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Easy synthesis and water solubility of ruthenium complexes containing PPh3, mTPPMS, PTA and mPTA, (mTPPMS = meta-triphenyphosphine monosulfonate, PTA = 1,3,5-triaza-7-phosphaadamantane, mPTA = N-methyl-1,3,5-triaza-7-phosphaadamantane)

New water soluble {CpRu} complexes with formula [RuCpX(L1)(L2)]n+(L1, L2= PPh3, mTPPMS (meta-triphenyphsphine monosulfonate), PTA (1,3,5-triaza-7-phosphaadamantane), mPTA (N-methyl-1,3,5-triaza-7-phosphaadamantane)) were synthesized and characterized by elemental analytical, IR and NMR spectroscopy. Complexes [RuClCp(PPh3)(mPTA)](OTf) (3¡¤OTf), [RuCpI(PPh3)(mPTA)]¡¤2I¡¤EtOH (5¡¤I¡¤EtOH)¡¤and [RuCpBr(PTA)2]¡¤3.5H2O (6¡¤3.5H2O) were also characterized by single crystal X-ray diffraction. The NMR spectra of the complexes are in agreement with their composition, indicating also that their solid state structure is maintained in solution. These results are integrated in a thorough overview of preparative routes, structural composition and solubility of {CpRu} complexes containing water-soluble phosphanes.

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

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Novel structural rearrangements induced by metal-metal interactions in ruthenium(II) ruthenocenyl- and (pentamethylruthenocenyl)acetylide complexes, RcC?CRuL2(eta5-C5R5) and Rc?C?CRuL2(eta5-C5R5)

The reaction of RcC?CH [Rc = (eta5-C5H5)Ru(eta5-C 5H4)] with RuCIL2(eta5-C5R5) [R = H or Me; L2 = 2PPh3 or Ph2PCH2CH2PPh2 (dppe)] in the presence of NH4PF6 and subsequent treatment with base gave Ru(II) ruthenocenylacetylide complexes RcC?CRuL2(eta5-C5R5) in good yields. In a similar manner, the pentamethylruthenocene analogues, Rc?C?CRuL2(eta5-C5R5) [Rc? = (eta5-C5Me5)Ru(eta5-C 5H4)], were also prepared. Cyclic voltammograms of the complexes showed two reversible one-electron-oxidation processes, consisting of the processes [Ru(II)Ru?(II] to [Ru(III)Ru?(II] and then to [Ru(III)Ru?(III)]. Chemical oxidation of the complexes induced novel structural rearrangement. The two-electron oxidation of complex RcC?CRu(PPh3)2(eta5-C5H 5) afforded a kind of allenylidene complex, a cyclopentadienyl-idenethylidene complex, [(eta5-C5H5)Ru{mu-eta 6:eta1-C5H4C=C}Ru(PPh 3)2(eta5-C5H5)] 2+, in 90% yield. The one-electron oxidation of Rc?C?CRu(PPh3)2(eta5-C 5H5) gave the vinylidene complex (Rc?CH=C)Ru(PPh3)2(eta5-C 5H5) in 62% yield, while the two-electron oxidation led to the fulvene-vinylidene complex [(eta6-C5Me4CH2)Ru{mu-eta 5:eta1-C5H4CH=C}Ru(PPh 3)2(eta5-C5R5)] 2+ by an intramolecular hydrogen transfer in 59% yield.

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

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Synthesis of organometallic Ru(II) and Fe(II) complexes containing fused rings hemi-helical ligands as chromophores. Evaluation of non-linear optical properties by HRS

A new family of three-legged piano stool structured organometallic compounds containing the fragment eta5-cyclopentadienyl-ruthenium(II)/iron(II) has been synthesized to evaluate the existence of electronic metal to ligand charge transfer upon coordination of the novel benzodithiophene ligands (BDT), benzo[1,2-b;4,3-b?]dithiophen-2-carbonitrile (L1) and benzo[1,2-b;4,3-b?]dithiophen-2?nitro-2-carbonitrile (L2). All the compounds were characterized by 1H, 13C, 31P NMR, IR and UV-Vis. spectroscopies and their electrochemistry studied by cyclic voltammetry. The X-ray structures of [Ru(eta5-C5H5)(PPh3)2(NCC10H5S2)][PF6] (1Ru), [Ru(eta5-C5H5)(PPh3)2(NCC10H5S2)][CF3SO3] (1?Ru), [Ru(eta5-C5H5)(DPPE)(NCC10H5S2)][PF6] 2Ru and [Fe(eta5-C5H5)(DPPE)(NCC10H5S2)][PF6] (2Fe) were determined by X-ray diffraction showing centric crystallization on groups P over(1, ?) and P21/n, respectively. Quadratic hyperpolarizabilities (beta) of some of the complexes (2Fe, 2Ru and 3Fe) have been determined by hyper-Rayleigh scattering (HRS) measurements at a fundamental wavelength of 1500 nm, to minimize the probability of fluorescence due to two-photon absorption and to reduce the effect of resonance enhancement, in order to estimate static beta values.

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

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A new diphosphinite derived from cyclohexane-1,4-diol: Oxidation reactions, metal complexes, P-O bond cleavage and X-ray crystal structures of Ph 2P(E)O(C6H10)OP(E)Ph2 (E = S, Se)

The reaction of cyclohexane-1,4-diol with chlorodiphenylphosphine affords bis(phosphinite), Ph2PO(C6H10)OPPh2 (1) in good yield. The bis(phosphinite) (1) reacts with H2O 2, elemental sulfur or selenium to give the corresponding dichalcogenide; the structures of the disulfide (3) and diselenide (4) derivatives are confirmed by X-ray crystal structure analysis. The reaction of 1 with phosphoryl azide, N3P(O)(OPh)2 gives the phosphinimine derivative, (PhO)2(O)PNPPh2O(C 6H10)OPh2PNP(O)(OPh)2 (5) in quantitative yield. Treatment of the ligand 1 with CpRu(PPh3) 2Cl results in a bis(phosphinite) bridged dinuclear complex, [CpRuCl(PPh3)]2(mu-PPh2O(C6H 10)OPPh2) (7) whereas the reaction of 1 with Pd(II) and Pt(II) derivatives afford cis-chelate complexes, [MCl2{Ph 2PO(C6H10)OPPh2}] (M = Pd, 8; Pt, 9). The reaction of 1 with Mo(CO)6 in the presence of TMNO¡¤2H2O does not give the expected cis-[Mo(CO) 4{Ph2PO(C6H10)OPPh2}]; instead a cubane-shaped tetranuclear molybdenum(V) complex, [Mo 4O4(mu3-O)4 (mu-O 2PPh2)4] (6) was obtained due to water assisted cleavage of P-O bonds.

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

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Synthesis, spectroelectrochemical, and EPR spectroscopic studies of mixed bis(alkynyl)biferrocenes of the type (LnMC?C)(L nM?C?C)bfc

The synthesis and properties of a series of complexes containing bis(ethynyl)biferrocene as a bridge between different redox-active group 8 metal fragments is described. These metal acetylide compounds of type (L nMC?C)(LnM?C?C)bfc (5a, LnM = Fe(Cp*)(eta2-dppe), LnM? = Ru(Cp)(Ph 3P)2; 5b, LnM = Fe(Cp*) (eta2-dppe), LnM? = Os(Cp)(Ph3P) 2; 5c, LnM = Ru(Cp)(Ph3P)2, L nM? = Os(Cp)(Ph3P)2; bfc = biferrocene-1?,1?-diyl, ((eta5-C5H 4)2Fe)2; dppe = 1,2-bis(diphenylphosphino) ethane, C2H4(PPh2)2; Cp = eta5-C5H5, Cp* = eta5- C5Me5) were prepared either by treatment of (HC?C)(LnM?C?C)bfc (LnM? = Ru(Cp)(Ph3P)2 (4b), Os(Cp)(Ph3P)2 (4c)) with Fe(Cp*)(eta2-dppe)Cl (2a) or by the reaction of 4c with Ru(Cp)(PPh3)2Cl (2b) in the presence of [H 4N][PF6] and KOtBu, respectively. Compounds 5a-c show well-separated reversible one-electron redox events in their cyclic voltammograms using [nBu4N][PF6] as supporting electrolyte in dichloromethane solutions. Absorption and vibrational spectroscopic studies were achieved for mixed-valence 5a-c[PF6] and 5a-c[PF6]2 by spectroelectrochemical methods (OTTLE), and in the case of the more robust Fe/Os system the higher oxidation states 5b[PF6]3 and 5b[PF6]4 were also characterized. Taken as a whole, our data indicate that direct electron transfer between the redox termini does not take place. Electron exchange results from dominant interactions between the redox termini and the proximal fc units (fc = Fe(eta5-C5H4)2) of the bfc moiety and a weak but sizable interaction between the fc units. Furthermore, EPR spectroscopy of 5a-c[PF6] allowed the simultaneous observation of the EPR signatures of half-sandwich metal-centered radicals and biferrocenium-centered radicals. This feature strongly supports that a multistep electron exchange mechanism takes place between the MLn/ M?Ln redox termini of this molecular array, with bridge-centered low-lying mediating states thermally populated even at 66 K. The g tensors of anisotropy (Deltag = g? – g?) of the bis(ethynyl)biferrocenyl moiety ranging between 2.26 and 2.42 for 5a-c[PF6] are consistent with a slow electron exchange rate between the fc units and confirmed that these mixed-valence complexes belong to class II compounds as defined by Robin and Day.

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

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Mono and dinuclear complexes of half-sandwich platinum group metals (Ru, Rh and Ir) bearing a flexible pyridyl-thiazole multidentate donor ligand

The mononuclear cationic complexes [(eta6-C6H6)RuCl(L)]+ (1), [(eta6-p-iPrC6H4Me)RuCl(L)]+ (2), [(eta5-C5H5)Ru(PPh3)(L)]+ (3), [(eta5-C5Me5)Ru(PPh3)(L)]+ (4), [(eta5-C5Me5)RhCl(L)]+ (5), [(eta5-C5Me5)IrCl(L)]+ (6) as well as the dinuclear dicationic complexes [{(eta6-C6H6)RuCl}2(L)]2+ (7), [{(eta6-p-iPrC6H4Me)RuCl}2(L)]2+ (8), [{(eta5-C5H5)Ru(PPh3)}2(L)]2+ (9), [{(eta5-C5Me5)Ru(PPh3)}2(L)]2+ (10), [{(eta5-C5Me5)RhCl}2(L)]2+ (11) and [{(eta5-C5Me5)IrCl}2(L)]2+ (12) have been synthesized from 4,4?-bis(2-pyridyl-4-thiazole) (L) and the corresponding complexes [(eta6-C6H6)Ru(mu-Cl)Cl]2, [(eta6-p-iPrC6H4Me)Ru(mu-Cl)Cl]2, [(eta5-C5H5)Ru(PPh3)2Cl)], [(eta5-C5Me5)Ru(PPh3)2Cl], [(eta5-C5Me5)Rh(mu-Cl)Cl]2 and [(eta5-C5Me5)Ir(mu-Cl)Cl]2, respectively. All complexes were isolated as hexafluorophosphate salts and characterized by IR, NMR, mass spectrometry and UV-vis spectroscopy. The X-ray crystal structure analyses of [3]PF6, [5]PF6, [8](PF6)2 and [12](PF6)2 reveal a typical piano-stool geometry around the metal centers with a five-membered metallo-cycle in which 4,4?-bis(2-pyridyl-4-thiazole) acts as a N,N?-chelating ligand.

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

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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, COA of Formula: C41H35ClP2Ru

1,2,3-Triazole based bisphosphine, 5-(diphenylphosphanyl)-1-(2-(diphenylphosphanyl)-phenyl)-4-phenyl-1: H -1,2,3-triazole: An ambidentate ligand with switchable coordination modes

The reaction of 1-(2-bromophenyl)-4-phenyl-1H-1,2,3-triazole (1) with Ph2PCl yielded bisphosphine, 5-(diphenylphosphanyl)-1-(2-(diphenylphosphanyl)phenyl)-4-phenyl-1H-1,2,3-triazole (2). Bisphosphine 2 exhibits ambidentate character in either the kappa2-P,N or kappa2-P,P coordination mode. Treatment of 2 with [M(CO)4(piperidine)2] (M = Mo and W) yielded kappa2-P,N and kappa2-P,P coordinated Mo0 and W0 complexes [M(CO)4(2)] [M = W-kappa2-P,N (4); Mo-kappa2-P,P (5); W-kappa2-P,P (6)] depending on the reaction conditions. Formation and stability of kappa2-P,P coordinated Mo0 and W0 complexes were assessed by time dependent 31P{1H} NMR experiments and DFT studies. The complex 4 on treatment with [AuCl(SMe2)] afforded the hetero-bimetallic complex [mu-PN,P-{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(PPh2AuCl)}-kappa2-P,N}W(CO)4] (7). The 1:1 reaction between 2 and [CpRu(PPh3)2Cl] yielded [(eta5-C5H5)RuCl{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(PPh2)}}-kappa2-P,P] (8), whereas the similar reaction with [Ru(eta6-p-cymene)Cl2]2 in a 2:1 molar ratio produced a cationic complex [(eta6-p-cymene)RuCl{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(PPh2)}}-kappa2-P,N]Cl (9). Similarly, treatment of 2 with [M(COD)(Cl)2] (M = Pd and Pt) in a 1:1 molar ratio yielded PdII and PtII complexes [{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(PPh2)}-kappa2-P,P}PdCl2] (10) and [{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(PPh2)}-kappa2-P,P}PtCl2] (11). The reaction of 2 with 2 equiv. of [AuCl(SMe2)] afforded [Au2Cl2{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(PPh2)}}-mu-P,P] (12). Most of the complexes have been structurally characterized. Palladium complex 10 shows excellent catalytic activity towards Cu-free Sonogashira alkynylation/cyclization reactions.

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

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Cyanoacetylenes and cyanoacetylides: Versatile ligands in organometallic chemistry

The nitrile like lone pair of the cyanoacetylene PhC?CCequiv;N (1) has been found to coordinate readily to the Ru(PPh3)2Cp fragment, to give [Ru(Nequiv;CCequiv;CPh)(PPh3)2Cp]PF 6 (2) which may be considered as an “extended” derivative of the more common benzonitrile complex [Ru(Nequiv;CPh)(PPh3) 2Cp]PF6 (3). Reaction of 1 with [Co2(CO) 6(dppm)] readily forms the mu, eta2 complex [Co 2(mu, eta2-PhC2Cequiv;N)(CO) 4(dppm)] (4), which reacts with [RuCl(PPh3)2Cp] to give the mixed metal species [{Co2(mu, eta 2-PhC2Cequiv;N){Ru(PPh3) 2Cp}(CO)4(mu-dppm)}]PF6 (5). The eta 1(N) bonded PhCequiv;CCequiv;N ligand is labile, being displaced by NCMe at ambient temperature to afford [Ru(NCMe)(PPh3) 2Cp]PF6, or by tcne to give trans-[{Ru(PPh 3)2Cp}2(mu-tcne)}][PF6] 2 (9). The metallocyanoacetylide [Ru(Cequiv;CCequiv;N)(PPh 3)2Cp] (6) was prepared by lithiation (BuLi) of [Ru(Cequiv;CH)(PPh3)2Cp] followed by treatment with PhOCN. Coordination of the metal fragments Ru(PPh3)2Cp or Fe(dppe)Cp to the N terminus in 6 occurs readily to give the homo- or hetero-bimetallic cations [{Cp(PPh3) 2Ru}(mu-Cequiv;CCequiv;N){ML2Cp}]+, which were isolated as the PF6 salts [ML2Cp = Ru(PPh 3)2Cp (7); Fe(dppe)Cp (8)]. The crystal structures of 2-5, 7 and 9 are reported. The electrochemical response of these complexes suggests there are considerable electronic interactions between the heterometallic end-caps in 8 through the polarised C3N bridge.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
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Phosphine substitution reactions of (eta5-cyclopentadienyl)ruthenium bis(triarylphosphine) chloride CpRu(PAr3)2Cl {PAr3 = PPh3, P(p-CH3C6H4)3, P(p-FC6H4)3, P(p-CH3OC6H4)3, and PPh2(p-CH3C6H4)}: A tale of two mechanisms

The kinetics of phosphine substitution in CpRu(PAr3)2Cl by PMePh2 under pseudo-first order conditions in CDCl3 have been measured for PAr3 = PPh3, 1a, PPh2(p-tol), 1b, P(p-tol)3, 1c, P(p-CH3OC6H4)3, 1d, and P(p-FC6H4)3), 1e. Activation parameters characteristic of a dissociative pathway (DeltaH? = 110-124 ¡À 2 kJ mol-1, DeltaS? = 16-44 ¡À 5-12 J mol-1 K-1) are observed for all five compounds. The rate of substitution in CpRu(PAr3)2Cl (1a) and CpRu[P(p-FC6H4)3]2Cl (1e) is independent of added chloride ion and decreases in the presence of excess PAr3, however, the rate of substitution in CpRu[P(p-CH3OC6H4)3]2Cl (1d) is first order in added chloride ion and is less dependent on added PAr3. A mechanism involving [CpRu(PAr3)2(PMePh2)]+[Cl]- intermediates contributes to the substitution in 1b-d. This journal is

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