- SmB6 nanoparticles: Synthesis, valence states, and magnetic properties
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Nanocrystalline SmB6 particles were synthesized by the solid-state reaction of Sm2O3/SmCl3 with NaBH4 in the temperature range of 1000-1200 °C. The phase composition, grain morphology, microstructure and valence states of SmB6 were investigated by using XRD, FESEM, HRTEM and XANES. It is interestingly found that the SmB6 nanocrystalline particles with size of 50 nm are easily prepared by using SmCl3 as raw material. The FFT patterns of HRTEM images reveal that the SmB6 nanocrystalline particles have a high crystallinity with cubic structure. The XANES results show that the valence state of Sm is more likely Sm3+. The magnetic measurement shows that the SmB6 nanoparticles show paramagnetic behavior, but there is a small anomaly in the paramagnetic state. The present synthesis technique is novel and invaluable for developing highly crystallized SmB6 nanoparticles.
- Bao, Lihong,Chao, Luomeng,Li, Yingjie,Ming, Ming,Yibole,Tegus
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- Gas-Phase Reaction Kinetics of BH
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Ground-state BH, generated from the photodissociation of BH3CO at 193 nm and monitored by laser-induced fluorescence, is reacted with NO, H2O, O2, CO2, CO, H2, CH4, C3H8, C2H4, and (CH3)2C=C(CH3)2 at 298 K.Values of the absolute rate constants for these reactions were extracted from observed BH concentration decay profiles (units of cm3 s -1): NO (1.35 +/- 0.20) x 10-10; H2O, (9.75 +/- 1.64) x 10-12; O2, (8.08 +/- 1.20) x 10-13; CO2, (2.64 +/- O.41) x 10-14; C3H8, (7.57 +/- 1.34) x 10-15; C2H4, (1.17 +/- 0.18) x 10-10; (CH3)2C=C(CH3)2, (1.87 +/- 0.30) x 10-10.The indicated ucertainties are +/- (2? plus estimated uncertainties in the measurement).An upper limit of 10-16 cm3s-1 is placed on the rate constant for reaction with CH4.The measured rate constants for the reaction of BH with CO and H2 show a dependence on total pressure.For the reaction BH + H2, we observe a large portion of the falloff region and are able to fit the data using the expression developed by Troe, leading to an estimated value for the limiting high-pressure rate constant of (3.67 +/- 0.91) x 10-13 cm3s-1.For the reaction of BH with CO, measured rate constants could not be extrapolated to the high-pressure limit and therefore were modeled by using a transition-state theory-RRKM approach.
- Rice, Jane K.,Caldwell, N. J.,Nelson, H. H.
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- IN-SITU FTIR EMISSION SPECTROSCOPY ON CHEMICAL VAPOUR DEPOSITION PROCESSES
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Infrared emission spectroscopy is a suitable method of detecting transient species in the gas phase and on the surface of growing layers inside a chemical vapour deposition process.The required high level of spectroscopic data results in the refinement of IR Fourier spectroscopy, the optimization of measuring conditions and the application of special modulation and spectra processing techniques.Results of the gas voronizing process of steel from BCl3/H2 mixtures and of the deposition of silicon carbide hard coatings from methyltrichlorosilane show the advantages of these techniques.In the gas phase transient species are detectable, e.g.HBCl2, H2BCl, BCl2 in the boron system and SiCl2, SiCl3, CH3, SiH2, Si2H4 in the silicon system, respectively.While on the metalic ironboride layer B-H, B-Cl and Fe-Cl species are found.
- Hopfe, V.,Wagner, D.,Klobes, P.,Herzig, S.,Marx, G.
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- Observation of the gas-phase infrared spectrum of BH3
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The gas-phase spectrum of BH3 was detected for the first time by diode laser spectroscopy through the observation of the ν2 band.The borane was produced by photolysis of B2H6 or BH3CO with an ArF excimer la,ser.The same spectrum was obtained by a discharge in a B2H6 and He mixture.Line assignments were made for the Q-branch series with J = K of the ν2 band; effects due to Coriolis perturbations by the ν4 state were recognized.
- Kawaguchi, Kentarou,Butler, J. E.,Yamada, Chikashi,Bauer, S. H.,Minowa, Tatsuya,et al.
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- Photodissociation Dynamics of BH3CO at 193 nm
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The photodissociation dynamics of the reaction BH3CO --> BH3 + CO at 193 nm have been investigated by using time-resolved infrared absorption spectroscopy and ultraviolet/visible emission spectroscopy.Partitioning of the available energy into the translational and vibrational degrees of freedom has been measured for the nascent CO photofragment.Time-resolved carbon monoxide laser absorption spectroscopy has been used to observe the CO photofragment in vibrationals levels v'' = 0-4.The nascent CO photofragment can be characterized by a vibrational temperature, Tvib = 2760 +/- 160 K.A lower limit to the CO translational energy, Etrans(v''=0) >= 5 kcal/mol, has been established by measuring the Doppler profile of two CO absorption lines with a tunable diode laser absorption system.Time-resolved tunable diode laser absorption spectroscopy has also been employed to observe internal excitation in the nascent BH3 photofragment, as well as measure the quantum yield for its production from BH3CO photolysis.A lower limit for the quantum yield, Φ193(BH3) >= 0.7+0.3-0.2, has been established.By comparison with limiting case models, we conclude that the photodissociation of BH3CO at 193 nm leads to a nonstatistical partitioning of energy into the BH3 fragment.
- Weiner, Brad R.,Pasternack, L.,Nelson, H. H.,Prather, K. A.,Rosenfeld, R. N.
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- Photoionization studies of (BH3)n (n= 1,2)
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The results of photoionization mass spectrometric studies on B2H6, and BH3 ( produced by pyrolysis of B2H6) are presented.The photoion yield curves of B2Hn+ (n = 2-6) and BHn+ (n = 2-3) from B2H6, as well as BHn+ (n = 1-3) from BH3 have been obtained.It is shown that the combination of appearance potential measurements for BH3+ (B2H6) and BH3+ (BH3) yields a poor upper limit for -ΔH dimerization,0 K (BH3) of 52.7 kcal/mol, while the combination of BH2+ (B2H6) and BH2+ (BH3) provides a better upper limit (46.6+/-0.6 kcal/mol) for this quantity.However, the threshold for BH+ (BH3), combined with auxiliary data, provides the best current experimental value, ( 34.3-39.1 )+/-2 kcal/mol.This experimental value is in good agreement with a recent ab initio calculation, and is arrived at by using the best current estimate of ΔHf(B2H6), rather than a radically different value proposed in that paper.The ionization potential of BH3, ΔHf (BH2+), and the atomization energy of BH3 obtained experimentally are in excellent agreement with other ab initio calculations.The upper limits on heats of formation for the ionic species B2Hn+ ( n = 2-6) are obtained, and plausible structures are discussed for these species, based on the current energetics and various ab initio calculations.Finally, the fragmentation behavior of photoions from diborane is shown to have a more facile explanation by quasiequilibrium theory than by a molecular orbital picture, with the probable exception of BH3+ (B2H6).
- Ruscic, B.,Mayhew, C. A.,Berkowitz, J.
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- Single-pot synthesis of zinc nanoparticles, borane (BH3) and closo-dodecaborate (B12H12)2- using LiBH 4 under mild conditions
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Reduction of ZnCl2 using LiBH4 in mesitylene yielded zinc nanoparticles (Zn-NPs), borane (BH3) and closo-dodecaborate (B12H12)2-. The BH3 evolved gas was trapped as Ph3/sub
- Ghanta, Sekher Reddy,Rao, Muddamarri Hanumantha,Muralidharan, Krishnamurthi
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- Hidden Boron Catalysis: Nucleophile-Promoted Decomposition of HBpin
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Simple nucleophiles with structural similarities to known hydroboration catalysts can readily mediate the formation of BH3 and borohydride species from pinacolborane (HBpin). Alkyne and alkene hydroboration reactions were successfully mediated by nucleophiles through BH3 generation, with BH3-catalyzed hydroboration found to dominate catalysis. NMR spectroscopy and kinetic analyses showed that the nucleophiles NaOtBu, Na[N(SiMe3)2], nBu2Mg, and nBuLi only promoted the formation of BH3 and were not "true" hydroboration catalysts.
- Bage, Andrew D.,Hunt, Thomas A.,Thomas, Stephen P.
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supporting information
(2020/05/18)
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- NOVEL 3, 4-PROPYLENEDIOXYTHIOPHENE DERIVATIVES WITH PENDANT FUNCTIONAL GROUPS
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The present invention relates to the syntheses of 3,4-propylenedioxythiophenes of the formula (I) wherein R represents a n-valent linear or branched, optionally substituted, aliphatic C1-Cn radical and Y represents a pendant functional group. Further, methods for the preparation of the said compounds are disclosed.
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Page/Page column 9-10
(2010/11/24)
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- Poisoning of heterogeneous, late transition metal dehydrocoupling catalysts by boranes and other group 13 hydrides
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Borane reagents are widely used as reductants for the generation of colloidal metals. When treated with a variety of heterogeneous catalysts such as colloidal Rh, Rh/Al2O3, and Rh(0) black, BH 3· THF (THF = tetrahydrofuran) was found to generate H 2 gas with the concomitant formation of a passivating boron layer on the surface of the Rh metal, thereby acting as a poison and rendering the catalyst inactive toward the dehydrocoupling of Me2NH-BH3. Analogous poisoning effects were also detected for (i) colloidal Rh treated with other species containing B-H bonds such as [HB-NH]3, or Ga-H bonds such as those present in GaH3-OEt2, (ii) colloidal Rh that was generated from Rh(I) and Rh(III) salts using borane or borohydrides as reductants, and (iii) for other metals such as Ru and Pd. In contrast, analogous poisoning effects were not detected for the catalytic hydrogenation of cyclohexene using Rh/Al2O3 or the Pd-catalyzed Suzuki cross-coupling of PhB(OH)2 and Phl. These results suggest that although this poisoning behavior is not a universal phenomenon, the observation that such boron layers are formed and surface passivation may exist needs to be carefully considered when borane reagents are used for the generation of metal colloids for catalytic or materials science applications.
- Jaska, Cory A.,Clark, Timothy J.,Clendenning, Scott B.,Grozea, Dan,Turak, Ayse,Lu, Zheng-Hong,Manners, Ian
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p. 5116 - 5124
(2007/10/03)
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- Synthesis, characterization and thermolysis of phosphinite-borane adducts: Investigation of an unusual thermally-induced phenol elimination reaction
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The synthesis, characterization and thermolytic behavior of a new class of phosphinite-borane adducts containing the bulky 2,4,6-t-Bu3C6H2O (Mes*O) group is reported, including the description of the first example of a primary phosphinite-borane adduct isolable at room temperature (Mes*O)PH2·BH3 1. Adduct 1 and the phenylated derivative (Mes*O)PhPH·BH3 3 formed highly cross-linked solids, 7 and 8, when heated to 100 and 140 °C, respectively. Characterization of these solids by solid state and solution NMR spectroscopy suggest that both dehydrocoupling (H2 elimination) and Mes*OH elimination occur simultaneously to give the complex products [(Mes*O)xRPHy-BH(2x + 2y + z)]n (R = H or Ph, x + y + z = 1). The tertiary adduct (Mes*O)Ph2P·BH3 5 and the phosphite-borane (PhO)3P·BH3 6 were found to decompose at high temperatures via P-B bond cleavage without formation of the corresponding phenol. These results suggest that the thermally-induced formation of Mes*OH from 1 and 3 occurs via α-elimination from a phosphorus center. Adducts 1, 3, 5 and 6 were also structurally characterized by single-crystal X-ray diffraction.
- Rivard, Eric,Lough, Alan J.,Manners, Ian
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p. 2966 - 2972
(2007/10/03)
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- Classical and nonclassical nitrosyl hydride complexes of rhenium in various oxidation states
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The paramagnetic rhenium complex [NEt4]2[Re(Br)5(NO)] (1) has been used to prepare a series of novel mononitrosyl hydride and dihydrogen rhenium complexes: [Re(Br)2(NO)(η2-H2)(PR3) 2] (R = iPr, 2a; Cy, 2b) and [Re(H)(BH4)(NO)(PR3)2] (R = iPr, 3a; Cy, 3b). The coordinated BH3 of the derivatives 3 can be replaced by the H2 or the NO ligand, thus leading to the tetrahydride and dinitrosyl species [Re(H)4(NO)L2] (R = iPr, 4a; Cy, 4b) or [Re(H)(NO)2(PR3)2] (R = iPr, 5a; Cy, 5b). While [Re(H)4(NO)(PPh3)2] does not seem to be stable, [Re(H)(NO)2(PPh3)2] (5c) has been obtained in a fashion similar to the preparation of 3a,b from the reaction of [Re(H)(BH4)(NO)(PPh3)2] and NOBF4. Detailed investigations of the reactions of 3a,b with NOBF4 have revealed that the compounds initially formed are the isolable BF3 adducts [Re(H)(NO)(NOBF3)(PR3)2] (R = iPr, 6a; Cy, 6b). The source of BF3 is the nitrosonium salt. Dissociation of BF3 from 6a,b takes place in donor solvents such as THF, affording the BF3-free compounds 5a,b, whereas in noncoordinating solvents such as toluene, benzene, or CH2Cl2 only the species 6a,b are observable. Apparently due to an unfavorable position of the dissociation equilibrium, the existence of the complex [Re(H)(NO)(NOBF3)(PPh3)2] could only be made plausible from dynamic NMR spectroscopic observations. Attempts to isolate it failed even from nonpolar solvents. X-ray diffraction studies have been carried out on the complexes [Re(Br)2(NO)(η2-H2)(PiPr 3)2] (2a), [Re(H)(BH4)(NO)(PR3)2] (R = iPr, 3a; Ph, 3c), [Re(H)(NO)2(PiPr3)2] (5a), and [Re(H)(NO)(NOBF3)(PiPr3)2] (6a). The hydrogen atoms of the η2-H2 moiety of 2a could not be located in the X-ray diffraction study, but their most probable position in the molecule has been traced by an extensive search based on DFT calculations.
- Gusev, Dimitri,Llamazares, Angela,Artus, Georg,Jacobsen, Heiko,Berke, Heinz
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- Chemistry of Dimetallaboranes Derived from the Reaction of [Cp*MCl2]2 with Monoboranes (M = Ru, Rh; Cp* = η5-C5Me5)
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In a single step, from [Cp*RuCl2]2 (Cp* = η5-C5Me5) and Li[BH4], nido-1,2-(Cp*Ru)2(μ-H)2B3H 7, 1, is produced in high yield. Addition of BH3·THF to 1 results in conversion to nido-1,2-(Cp*Ru)2(μ-H)B4H9, 2. Reaction of BH3·THF directly with [Cp*RuCl2]2 yields a mixture of 1 and 2. In two steps, a rhodium analogue, nido-2,3-(Cp*Rh)2B3H7, 9, is accessible by the reaction of [Cp*RhCl2]2 and Li[BH4] to exclusively produce (Cp*Rh)2B2H6, 8, which adds BH3·THF to give 9 as the major product in a mixture. Reaction of BH3·THF directly with [Cp*RhCl2]2 yields the chloro derivative of 9, nido-1-Cl-2,3-(Cp*Rh)2B3H6, 11, in high yield via the intermediate positional isomer, nido-3-Cl-1,2-(Cp*Rh)2B3H6, 10. With high concentrations of Co2(CO)8, 1 reacts with Co2(CO)8 to give nido-1-(Cp*Ru)-2-(Cp*RuCO)-3-Co(CO)2(μ 3-CO)B3H6,3, whereas low concentrations permit competitive degradation of 1 to yield arachno-(Cp*Ru)(CO)(μ-H)B3H7, 4. On the other hand, reaction of 11 with Co2(CO)8 gives closo-1-Cl-6-{Co(CO)2}-2,3-(Cp*Rh)2(μ 3-CO)B3H3, 12. Mild thermolysis of 3 results in loss of hydrogen and the formation of closo-6-Co(CO)2-2,3-(Cp*Ru)2(μ-CO)(μ 3-CO)B3H4, 5, whereas thermolysis of 2 results in loss of hydrogen and formation of pileo-2,3-(Cp*Ru)2B4H8, 6, with a BH-capped square pyramidal structure. Finally, 6 reacts with Fe2(CO)9 to yield pileo-6-Fe(CO)3-2,3-(Cp*Ru)2(μ 3-CO)B4H4, 7, with a BH-capped octahedral cluster structure. The overall isolated yield of 7, formed in four steps from [Cp*RuCl2]2, is ≈50% and evidences good control of reactivity.
- Lei, Xinjian,Shang, Maoyu,Fehlner, Thomas P.
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p. 1275 - 1287
(2007/10/03)
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- Group 5 metallocene complexes as models for Metal-Mediated hydroboration: Synthesis of a reactive borane adduct, endo-Cp*2Nb(H2BO2C6H4), via hydroboration of coordinated olefins
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The olefin complexes Cp*2M(CH2=CH(R))(H) (R = H (1), CH3 (2); M = Nb (a), Ta (b)) react cleanly with catecholborane (HBCat) and HBO2C6H3-4-(t)Bu (HBCat') to give Cp*2M(H2/s
- Lantero, Dean R.,Ward, Donald L.,Smith III, Milton R.
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p. 9699 - 9708
(2007/10/03)
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- Zirconium and hafnium polyhydrides. Preparation and characterization of M2H3(BH4)5(PMe3) 2, MH(BH4)3(dmpe), and MH2(BH4)2(dmpe)2
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Treatment of the zirconium and hafnium tetrahydroborate complexes M(BH4)4 with trimethylphosphine yields amber (M = Zr) or colorless (M = Hf) crystals of the new polyhydride complexes Zr2H3(BH4)5(PMe3) 2 and Hf2H3(BH4)5(PMe3) 2. These d0 complexes exhibit triplets (JPH ≈ 13 Hz) for the hydride ligands in their 1H NMR spectra at δ 3.96 (Zr) and 8.53 (Hf). The 1H, 11B{1H}, and 31P{1H} NMR spectra show that there is only one phosphine environment but two BH4- environments in a 2:3 ratio. Single-crystal X-ray diffraction studies of the two complexes in each case reveal a distinctly asymmetric dinuclear structure bridged by three hydrogen atoms. One metal center is ligated by three terminal tridentate BH4- groups, while the other is ligated by the two phosphines and by one tridentate and one bidentate BH4- group. All the metal-ligand distances in the zirconium complex are slightly longer than those in the hafnium complex, as expected from the relative ionic radii: Zr?Zr = 3.124 (1) A?, Zr-Hb = 1.92 (4) A?, Zr-P = 2.750 (1) A?, Zr-B = 2.346 (8) A? (η3-BH4), Zr-B = 2.604 (8) A? (η2-BH4), Zr-H-Zr = 109 (3)°; Hf?Hf = 3.076 (1) A?, Hf-P = 2.725 (6) A?, Hf-B = 2.34 (3) A? (η3-BH4), and Hf-B = 2.53 (3) A? (η2-BH4). Treatment of the M(BH4)4 complexes with the bidentate phosphine 1,2-bis(dimethylphosphino)ethane gives mononuclear hydrides of stoichiometry MH(BH4)3(dmpe) or MH2(BH4)2(dmpe)2, depending on the conditions. The monohydride complexes MH(BH4)3(dmpe) contain both bidentate and tridentate BH4- groups as judged by IR spectroscopy. The 1H NMR spectra show a triplet for the terminal hydride groups at δ 6.08 (JPH = 56 Hz) for M = Zr and 10.99 (JPH = 45 Hz) for M = Hf. The 1H NMR spectra also show that there are two PMe2 environments, while the 11B{1H} and 31P{1H} NMR spectra show that there is a single BH4- and a single phosphorus environment. These data are consistent with a pseudooctahedral structure in which the three mutually fac BH4- groups are exchanging with each other. The BH4- groups in the dihydride complexes MH2(BH4)2(dmpe)2 are bidentate by IR spectroscopy. The 1H NMR spectra show that there is one hydride environment and one BH4- environment but that the two ends of each dmpe ligand are inequivalent. The terminal hydride resonances at δ 3.38 (Zr) and 6.65 (Hf) are complex multiplets arising from the X part of XX′AA′BB′ spin systems. Simulation of the resonances suggests that the coupling constant between the two hydride ligands may be unusually large at ca. 30 Hz. The possibility that nuclear exchange processes are responsible for this large coupling constant was ruled out on the basis of deuteration studies. Interestingly, these MH2(BH4)2(dmpe)2 molecules are nonfluxional at room temperature, despite the high coordination numbers (8 or 10, depending on how the BH4- groups are counted). Variable-temperature NMR spectroscopy shows that the molecules undergo an intramolecular fluxional process with an activation energy of 15.6 kcal mol-1; this value is unusually high for a molecule with such a high coordination number. Crystal data for Zr2C6H41B5P2 at -75°C are as follows: orthorhombic; P212121; a = 10.921 (2) A?, b = 12.255 (3) A?, c = 16.524 (6) A?, V = 2212 (1) A?3, Z = 4, Rf = 0.031, Rwf = 0.029 for 301 variables and 2821 data for which I > 2.58σ(I). Crystal data for Hf2C6H41B5P2 at -75°C are as follows orthorhombic; P212121; a = 10.860 (7) A?, b = 12.248 (7) A?, c = 16.490 (4) A?, V = 2193 (3) A?3, Z = 4, Rf = 0.042, Rwf = 0.051 for 112 variables and 1634 data for which I > 2.58σ(I).
- Gozum, John E.,Girolami, Gregory S.
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p. 3829 - 3837
(2007/10/02)
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- Synthesis, Reactivity, and Spectroscopic Studies of Some Tetranuclear OSmium Clusters. Structural Characterization of 3-NC(O)Me> (M=Au or Cu) and
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The interaction of (1) with (X=NO2, Cl, Br, or I) affords the species 3-NC(O)Me>> (2) (X=NO2), , and which were characterized by i.r. and 1H n.m.r. spectroscopy.The reaction of complex (1) with nitrite ion results in a novel interaction which involves oxygen transfer from the nitrite ion and conversion of a co-ordinated NCMe ligand into an amido group on the cluster surface.The anionic species (2) reacts with + to yield the neutral mixed-metal clusters 3-NC(O)Me>> which have been structurally characterized by single-crystal X-ray diffractometry.This shows that they possess a butterfly metal framework capped by the heterometallic fragment and μ3-bridged by the four-electron-donor amido group.Complexes (3) and (4) are isomorphous, monoclinic, with space group C2/c and Z=8:: (3), a=25.681(7), b=16.069(1), c=18.265(2) Angstroem, and β=90.90(1) deg; (4) a=25.318(6), b=15.964(5), c=18.347(7) Angstroem, and β=91.80(2) deg.Spectroscopic data suggest that compounds (6) and (7) also possess a butterfly metal framework with a bridging, three-electron-donor, halide ligand, while the anionic species (11) possesses a tetrahedral arrangement of metal atoms with a terminally co-ordinated iodide ligand, as shown by X-ray diffractometry: monoclinic, space group P21/a, Z=8, a=16.841(2), b=20.699(1), c=29.249(3), and β=90.91(2) deg.Protonation of (11) yields the neutral species , showing that facile reversible tetrahedral-butterfly interconversion is assisted by a change in co-ordination mode and electron donation of the I atom.The reaction of compound (11) with CF3SO3R (R=Me or Et) was monitored by 1H n.m.r. spectroscopy and the results explained in terms of the formation of alkyl iodide derivatives.
- Puga, Jose,Arce, Alejandro,Sanchez-Delgado, Roberto A.,Ascanio, Julian,Andriollo, Antida,et al.
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p. 913 - 924
(2007/10/02)
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- Transfer reactions involving boron. XX. Disproportionation reactions of alkyl-, alkoxy-, and haloboranes
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The solution redistribution equilibria of borane with alkylboranes, alkoxyboranes, haloboranes, and arylmercaptoboranes have been studied. The results obtained with the various systems are discussed individually and compared with each other and, when available, with gas-phase and other data appearing in the literature. The redistribution of trialkylboranes with borane in tetrahydrofuran produces a mixture of mono-, di-, and trialkylboranes and borane, the first two being the predominant products. Complicating the systems are the presence of five hydrogen-bridged monomer-dimer equilibria. The equilibrium constants for these equilibria have been determined for the n-propyl- and isopropylborane systems. The reaction of 1 or 2 mol of alcohols with 1 mol of borane produces dialkoxyboranes in kinetically controlled reactions. The dialkoxyboranes undergo slow redistribution reactions to give mixtures of borane and di- and trialkoxyboranes. Similarly, trialkyl borates and borane undergo slow disproportionation reactions. The redistribution equilibrium constants are identical, within experimental error, for primary and secondary alkoxyborane systems; however, the t-butoxyborane equilibrium constant is significantly different. The rate of attainment of equilibrium is markedly dependent on the structure of the alkoxy group. Boron trichloride reacts with borane to give either mono- or dichloroborane depending on the stoichiometry of the starting reagents, whereas boron trifiuoride does not react with borane.
- Pasto,Balasubramaniyan,Wojtkowski
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p. 594 - 598
(2008/10/08)
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