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121.
G. Ingold H. G. Bohlen M. Clover H. Lettau H. Ossenbrink W. von Oertzen 《Zeitschrift für Physik A Hadrons and Nuclei》1982,309(2):135-142
Level structure of102Cd has been studied via both102In decay and nuclear reactions. Using92Mo+14N at 86 MeV, the nucleus102In was identified and its decay (T 1/2=24 ±4s) studied with the aid of on-line mass separation techniques. Levels of102Cd were also populated with92Mo+12C at 50 MeV and102Pd+3He at 35 MeV reactions and investigated by means of standard in-beam techniques. A level scheme including states up to 4.5 MeV excitation energy is proposed and then discussed in the frame of available calculations. 相似文献
122.
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124.
R. S. Cahn Christopher Ingold V. Prelog 《Angewandte Chemie (International ed. in English)》1966,5(4):385-415
The topological analysis of chiral molecular models has provided the framework of a general system for the specification of their chirality. The application, made in and before 1956, of this system to organic-chemical configurations is generally retained, but is redefined with respect to certain types of structure, largely in the light of experience gained since 1956 in the Beilstein Institute and elsewhere. The system is now extended to deal, on the one hand, with organic-chemical conformations, and, on the other, with inorganic-chemical configurations to ligancy six. Matters arising in connexion with the transference of chiral specifications from model to name are considered, notably that of the symbiosis in nomenclature of expressions of the general system and of systems of confined scope. For corrigendum see DOI: 10.1002/anie.196605111 相似文献
125.
Z. Burshtein A.W. Hansom C.F. Ingold D.F. Williams 《Journal of Physics and Chemistry of Solids》1978,39(10):1125-1131
Hole drift mobilities have been measured in β-9,10 dichloroanthracene by the transient photoconductivity method. Mobilities were found to be isotropic in the ac plane, 0.6 cm2/V sec, and 0.18 cm2/V sec normal to this plane, b1, at room temperature. At lower temperatures the mobilities were thermally activated, with an activation energy of ~0.25eV. The crystal structure of β-9,10 dichloroanthracene has been determined; it is triclinic. , , , . The influence of the crystal structures of the α- and β- forms on the intermolecular electronic overlap and hence carrier mobilities are discussed. 相似文献
126.
In methanol/water, dpph(?) bleaching (519 nm) by quercetin, QH(2), exhibits biphasic kinetics. The dpph(?) reacts completely with the quercetin anion within 100 ms. Subsequent slower bleaching involves solvent and QH(2) addition to quinoid products. The fast reaction is first-order in dpph(?) but only ca. 0.38 order in [QH(2)]. This extraordinary nonintegral order is attributed to reversible formation of π-stacked {QH(-)/dpph(?)} complexes in which electron transfer to products, {QH(?)/dpph(-)}, is slow (k(ET) ≈ 10(5) s(-1)). 相似文献
127.
The m-methoxy group is normally electron-withdrawing (EW), sigma(m) = +0.12, sigma(m+) = +0.05. The strong EW activity of a phenoxyl radical's O* atom causes the m-methoxy group to become electron-donating (ED), sigma(m)(+) = -0.14. In valence bond terms, this can be ascribed to the nonclassical resonance structures 1c-e. Although it has long been known that m-methoxy is ED in photoexcited states, it has now been found to be ED for homolytic O-H bond breaking in ground-state 3-methoxyphenol. 相似文献
128.
Grossi and Strazzari have reported (J. Org. Chem. 2000, 65, 2748-2754) that the ceric ammonium nitrate modulated photooxidation of triphenylmethanol and 1,1-diphenylethanol yielded ESR spectra of the putative spiro-cyclohexadienyl intermediates in the O-neophyl rearrangements of the corresponding alkoxyl radicals, Ph2(R)CO* (R = Ph, CH3), to the phenoxymethyl radicals, Ph(R)C*OPh. Both ESR spectra are reassigned to the phenoxyl radical, C6H5O*, and the probable mechanism by which phenoxyl is formed in these systems is presented. 相似文献