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1.
Thermodynamics of the System Si? Cl? H By static and dynamic methods the equilibria 4SiHCl3,g = 3SiHCl4,g + Si,s + 2H2,g (1) between 800 and 1140 K and SiCl4,g + H2,g = SiHCl3,g + HCl,g (2) between 1170 and 1450 K were investigated. The expression for the temperature dependence of the equilibria were found to be lg Kp [Torr] = (5.688–1520/T) ± 0.32 (1) and lg Kp = (1.38/3250/T) ± 0.16 (2). The values measured for reaction pressures and equilibrium constants lead to the conclusion, that the difference of enthalpies of formation of SiCl4 and SiHCl3 found in literature is nessecarily to be corrected by 5–6 kcal/mole. With ΔH(SiCl4,g) = ?157.1 kcal/mole the equilibrium measurements lead to the enthalpy of formation for SiHCl3,g of ΔH(SiHCl3,g) = ?118.2 kcal/mole. 相似文献
2.
Ammonium Chloro(thio)phosphate Betaines, a Class of Coordination-stabilized Chloro(thio)metaphosphates Ammonium chloro(thio)phosphate betaines behave like systems being in equilibrium with tert. amine and monomeric chloro(thio)metaphosphate. In solution at room temperature the amine component can be displaced by stronger donors. Mass spectra reveal the presence of ClPS2 as monomer and dimer, of ClPO2 by fragment ions of the dimer, trimer, and tetramer before reorganization takes place to form PXCl3 and P4X10 (X = O, S). Detection of ClPOS fails owing to fast equilibration into ClPO2 and ClPS2. 相似文献
3.
Keller Teichmann Hans Pfeiffer W. Langenbeck A. Reid Heinrich Menzel Th. Höpner W. Mühlsteph M. Ulmann Geib R. E. Liesegang 《Colloid and polymer science》1939,87(1):100-104
Ohne Zusammenfassung 相似文献
4.
Wo. O Dr. Friese Langenbeck R. E. Liesegang Teichmann Reitstötter 《Colloid and polymer science》1938,83(1):116-120
Ohne Zusammenfassung 相似文献
5.
The ionic liquid 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) was successfully used as alternative solvent for native chemical ligation of peptide fragments to produce model peptide LYRAXCRANK (X = G, A, L, N, Q, K, and F). The commonly used buffer system including thiol additives such as thiophenol and benzyl mercaptan can be replaced by the nontoxic ionic liquid [C2mim][OAc]. In addition to improving the solubility of the peptides in [C2mim][OAc], yields and rates of the ligation reactions were found to be efficiently enhanced. 相似文献
6.
Hohenberger M Symes DR Madison KW Sumeruk A Dyer G Edens A Grigsby W Hays G Teichmann M Ditmire T 《Physical review letters》2005,95(19):195003
Intense, femtosecond irradiation of atomic and molecular clusters can initiate Coulomb explosions, generating particle energies sufficient to drive nuclear fusion. Last and Jortner have proposed, based on particle dynamics simulations, that heteronuclear clusters with a mixture of heavy and light ions will not explode by the simple, equilibrium Coulomb model but that dynamic effects can lead to a boosting of energy of the lighter ejected ions [Phys. Rev. Lett. 87, 033401 (2001)]. We present experimental confirmation of this theoretically predicted ion energy enhancement in methane clusters. 相似文献
7.
Bourdel T Khaykovich L Cubizolles J Zhang J Chevy F Teichmann M Tarruell L Kokkelmans SJ Salomon C 《Physical review letters》2004,93(5):050401
We report Bose-Einstein condensation of weakly bound 6Li2 molecules in a crossed optical trap near a Feshbach resonance. We measure a molecule-molecule scattering length of 170(+100)(-60) nm at 770 G, in good agreement with theory. We study the 2D expansion of the cloud and show deviation from hydrodynamic behavior in the BEC-BCS crossover region. 相似文献
8.
Volume Contents
Contents of Volume 23 (2003) 相似文献9.
10.
Martin Keller-Ressel Walter Schachermayer Josef Teichmann 《Probability Theory and Related Fields》2011,151(3-4):591-611
We show that stochastically continuous, time-homogeneous affine processes on the canonical state space ${\mathbb{R}_{\geq 0}^m \times \mathbb{R}^n}$ are always regular. In the paper of Duffie et?al. (Ann Appl Probab 13(3):984?C1053, 2003) regularity was used as a crucial basic assumption. It was left open whether this regularity condition is automatically satisfied for stochastically continuous affine processes. We now show that the regularity assumption is indeed superfluous, since regularity follows from stochastic continuity and the exponentially affine form of the characteristic function. For the proof we combine classic results on the differentiability of transformation semigroups with the method of the moving frame which has been recently found to be useful in the theory of SPDEs. 相似文献