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E. K. Starostin A. A. Mazurchik A. V. Ignatenko G. I. Nikishin 《Russian Chemical Bulletin》1993,42(7):1174-1178
The decomposition of 1,4-dihydroxy-1,4-dihydroperoxycyclohexane under the action of FeSO4 and the decomposition of 1,4-cyclohexanedione monoethyleneketal hydroperoxide under the action of FeII salts in the presence of various ligands or under the action of CuII sulfate have been studied. A preparative method for the synthesis of derivatives of diketodicarboxylic or -functionally substituted ketocarboxylic acids from 1,4-cyclohexanedione monoethyleneketal has been developed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1231–1235, July, 1993. 相似文献
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L. N. Novikova B. A. Mazurchik N. A. Ustynyuk S. V. Kukharenko V. V. Strelets 《Russian Chemical Bulletin》1994,43(2):299-303
New cationic complexes [(6-C13H10)Fe(5-Cp*)]PF6 and [(6-9-CH3-C13H9)Fe(5-Cp*)]PF6 were obtained by the reaction of Cp*Fe(CO)2Br with fluorene and 9-methylfluorene, respectively. Deprotonation of these complexes byt-BuOK in THF affords zwitter-ionic compounds (6-C13H9)Fe(5-Cp*) and (6-9-CH3-C13H8)Fe(5-Cp*) (A). WhenA is heated in nonane at 150 °C it undergoes 65 inter-ring rearrangement with the formation of hexamethyldibenzoferrocene (B). The electrochemical behavior ofA andB was studied by cyclic voltammetry. One-electron reduction ofA andB to the corresponding radical anions induces inter-ring haptotropic rearrangementA
.–B
.–. The equilibrium in the 19 state is shifted to the 6-isomeric radical anionA
.–, while in the 18 precursors, it shifts to the 5-isomerB.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 319–324, February, 1994.The authors are grateful to D. V. Zagorevskii (A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences) for recording and interpreting the mass spectra, and to A. A. Borisenko (Moscow State University) for recording the NMR spectra.This work was financially supported by the Russian Foundation for Basic Research (Grant 93-03-5209). 相似文献
3.
Novikova L. N. Mazurchik B. A. Oprunenko Yu. F. Ustynyuk N. A. 《Russian Chemical Bulletin》2001,50(1):157-158
The kinetics of the reversible isomerization of the zwitterionic complex [(6-C13H9)Fe(5-C5H5)] (1) into dibenzoferrocene (2) was studied by electronic spectroscopy in the temperature range from 70 to 103 °C. The activation parameters of the reaction 1 2 were determined, E
a = 22.5 kcal mol–1. 相似文献
4.
E. K. Starostin A. A. Mazurchik A. V. Ignatenko V. M. Promyslov N. D. Chuvylkin G. I. Nikitin 《Russian Chemical Bulletin》1992,41(1):112-116
The reactivity of cyclohexanediones and their monoethylene ketals with hydrogen peroxide was studied. It was established that 1,2- and 1,3-cyclohexanediones virtually do not react with H2O2, whereas 1,4-cyclohexanedione forms 1,4-dihydroxy-1,4-dihydroperoxycyclohexane. Monoethylene ketals of cyclohexanediones react with hydrogen peroxide to form the corresponding -hydroxy--hydroperoxides. The stereoelectronic factors determining the difference in reactivity of the carbonyl fragment in cyclohexanone, 1,2-cyclohexanedione, and its monoethylene ketal were analyzed within the framework of the semiempirical quantum chemical method MNDO.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 142–147, January, 1992. 相似文献
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