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1.
S. S. Nikol'skii 《Theoretical and Experimental Chemistry》1967,1(4):305-308
The number of parameters in the polynomial is discussed for N components and a polynomial extending up to power n. This number is found to be
but may be N less for relative thermodynamic functions. The equation of degree n for an N-component system requires the use of
data for each of the
i-component systems. Data on the n-component systems suffice if n相似文献
2.
A. B. Terent'ev 《Russian Chemical Bulletin》1973,22(11):2469-2471
Conclusions The principal products of the telomerization of propylene with methyl propionate are telomers with the structure
, where n=1–4.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2534–2537, November, 1973. 相似文献
3.
A. B. Terent'ev 《Russian Chemical Bulletin》1973,22(11):2472-2474
Conclusions The teloHierization of vinyl chloride with methyl propionate was accomplished and it was shown that telomers of type
are formed.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2537–2540, November, 1973. 相似文献
4.
V. V. Zorin S. S. Zlot-skii A. V. Il'yasov D. L. Rakhmankulov 《Russian Chemical Bulletin》1976,25(9):1965-1966
Conclusions Employing the EPR method and 2-methyl-2-nitrosopropane as the spin trap, we recorded the formation of the radicals
(n = 1 and 2; X = O, N, or a chain composed of C and O atoms; R = H or alkyl) during the photolysis of acetals and their heteroanalogs
in the presence of di-tertbutyl peroxide.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2097–2099, September, 1976.The authors are indebted to A. Sh. Mukhtarov for assistance in running the experiments. 相似文献
5.
Zusammenfassung Es wird die Frage untersucht, ob bei der thermischen Umlagerung von entsprechend allyl-substituierten o-Benzochinol-acetaten der Allyl- oder der Acetoxylrest rascher wandert. Das 2-Allyl-2-acetoxy-cyclohexadienon liefert bei der genannten Reaktion (es sind schon Temperaturen um 100° ausreichend) überwiegend ein Monoacetat des 4-Allylbrenzcatechins. Damit ist bewiesen, daß der Rest
rascher als der Rest
in die p-Stellung zur Carbonylgruppe des Chinolacetates wandert. Eine Wanderung des Acetoxylrestes in die o- oder in die p-Stellung zur Carbonylgruppe, welche zur Bildung von 3-Allyl-brenzcatechin bzw. 2-Allylhydrochinon führen müßte, konnte nicht beobachtet werden. Entsprechend liefert das 2,6-Diallyl-2-acetoxy-cyclohexadienon bei der thermischen Umlagerung überwiegend ein Monoacetat des 3,5-Diallyl-brenzcatechins. Nach einem anderen Mechanismus verläuft die Umlagerung des 2-Methyl-6-allyl-2-acetoxy-cyclohexadienons. Es entsteht neben wenig 2-Methyl-6-allyl-hydrochinon in der Hauptmenge ein Monoacetat des 3-Methyl-5-allyl-brenzcatechins. Es wird also die Allylgruppe durch den in die o-Stellung wandernden Acetoxylrest verdrängt. Auf diese Reaktion wird näher eingegangen, weil sie in engem Zusammenhang mit der Frage steht, ob ganz allgemein eine Umlagerung von o-Chinolacetaten vom Typ
in die Isomeren
möglich ist.Mit 2 AbbildungenHerrn Prof. Dr.F. Feigl zum 70. Geburtstag in alter Freundschaft!F. W.
E. Zbiral, F. Wessely undE. Lahrmann, (gilt als 1. Mitt. dieser Reihe), Mh. Chem.91, 331 (1960). 相似文献
6.
Thermal membrane potentials across the perfluorosulfonic acid-type membrane, Flemion S, were measured for HCl, alkali metal chlorides, and ammonium and methyl ammonium chlorides. The difference between the mean molar transported entropy of the counterions in the membrane and the partial molar entropy of the counterions in the external solution
was determined from the experimental data on thermal membrane potential, thermoosmosis and electroosmosis. The sign of the thermal membrane potential in HCl solution varies from positive to negative with the concentration. In HCl and alkali metal chloride solutions, the order of their thermal membrane potentials (–/T) is H+>Li+=Na+>K+ which is roughly the inverse of that of the crystallographic radii of the ions. However, the order of their entropy differences
is H+>Na+>K+>Li+ which is just the inverse of that of their thermoosmotic coefficients (D) or the entropy difference of water
in thermoosmosis. For the ammonium and methyl ammonium ion forms, the orders of both –/T and
increase with an increasing number of methyl groups: (CH3)4N+>(CH3)3NH+>(CH3)2NH
2
+
> CH3NH
3
+
>NH
4
+
, which is also the inverse of that ofD or
. 相似文献
7.
K. I. Rezchikova N. V. Grigor'eva I. I. Bannova O. P. Shitov V. A. Shlyapochnikov 《Russian Chemical Bulletin》1991,40(11):2167-2173
Vibrational spectroscopy and x-ray structure analysis have been used to investigate three new types of sulfonium nitroimides: N-nitrosulfylimides, N-nitrosulfoximides, and N,N-dinitrosulfodiimides. Structural parameters have been determined for the molecules
,
, and
.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2489–2496, November, 1991. 相似文献
8.
Summary A new method is described for synthesizing aromatic -amino ketones with the general formula
, which is based on the condensation of azlactones with benzene in the presence of aluminum chloride. 相似文献
9.
A method of synthesizing hitherto unknown 1-aroxysilatranes
(R=aryl) is worked out. It is based on transesterification of lower tetraalkoxysilanes with an equimolecular mixture of triethanolamine and the appropriate phenol (naphthol). Using the method, 12 compounds of the indicated type have been prepared and characterized, the yields in the main exceeding 90%.For Part VII see [1]. 相似文献
10.
M. I. Kabachnik D. I. Lobanov A. G. Matveeva O. E. Kovsheva M. I. Terekhova É. S. Petrov P. V. Petrovskii E. I. Matrosov 《Russian Chemical Bulletin》1991,40(7):1417-1422
Several substituted methylaminotriphenylphosphonium salts (APS) of general formula
have been synthesized. The CH-acidities of some of the prepared APS have been measured by the indicator method in DMSO, with K+ counterion and 9-phenylfluorene (pK 18.5) as standard, showing a pK range of 14.7–24.8. The acidification effect of
and
groups has been evaluated. The results obtained suggest that there is an effective charge on the nitrogen atom in the APS studied and an increased multiplicity of the N-P bond.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1598–1604, July, 1991. 相似文献
11.
A series of mechanisms allowing oscillations and differring in the form of their buffer steps (step 3)
相似文献
12.
J. L. Oscarson R. M. Izatt P. R. Brown Z. Pawlak S. E. Gillespie J. J. Christensen 《Journal of solution chemistry》1988,17(9):841-863
The aqueous reactions,
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