نتایج جستجو برای: br2
تعداد نتایج: 493 فیلتر نتایج به سال:
Theoretical adiabatic electron affinities are often considered inaccurate because they are referenced to only a single value. Ground state electron affinities for all the main group elements and homonuclear diatomics were identified recently using the normalized binding energy of the hydrogen atom: [0.75420375(3)/2 = 0.37710187(1) eV]. Here we revisit experimental values and extend the identifi...
We describe a novel, integrated multi-step process for the partial oxidation of alkanes to alcohols, ethers or olefins using O2 as oxidant. The sequential transformations are (1) alkane bromination to alkyl bromide(s) and HBr, (2) reaction of this mixture with solid metal oxide (MO) to neutralize the HBr and to generate oxygenated products or olefins plus solid metal bromide, and (3) oxidation ...
A simple effective atom-atom intermolecular potential for halogene solids (F2, Cl-, Br2 and 12) is proposed. The centers of inter action of the effective potential (6-exp type) are shifted from' the atomic sites in order to reduce anisotropy of the intermolecular distances. The calculated results of the static properties for fluorine and chlorine are in good agreement with the experimental resu...
In this text we shall review the classification of foliations on complex projective surfaces according to their Kodaira dimension, following McQuillan’s seminal paper [MQ1] with some complements and variations given by [Br1] and [Br2]. Most of the proofs will be only sketched, and the text should be considered as guidelines to the above works (and related ones), with no exhaustivity nor selfcon...
A highly efficient transition-metal-free catalytic system Br2/NaNO2/H2O has been developed for a robust and economic acid-free aerobic oxidation of sulfides. It is noteworthy that the sulfide function reacts under mild conditions without over-oxidation to sulfone. The role of NaNO2as an efficient NO equivalent for the activation of molecular oxygen was identified. Under the optimal conditions, ...
AMS classification : 35L65, 47H05 Abstract We show that Kruzhkov’s theory of entropy solutions to multidimensional scalar conservation laws [Kr] can be entirely recast in L and fits into the general theory of maximal monotone operators in Hilbert spaces. Our approach is based on a combination of level-set, kinetic and transport-collapse approximations, in the spirit of previous works by Giga, M...
We derive for the Navier-Stokes equation an exact equation satisfied by the dissipation rate correlation function, 〈ǫ(~x+~r, t+ τ)ǫ(~x, t)〉. In the equal time limit, for the homogeneous, isotropic state of fullydeveloped turbulence, we show that the correlation function behaves as Ar1 +Br2 with μ1 = 2−ζ6 and μ2 = z ′′ 4−ζ4 for r in the inertial range; the ζ’s are exponents of velocity structure...
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