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851.
852.
I. P. Trifonova V. A. Burmistrov A. S. Ocheretovyi O. I. Koifman 《Russian Journal of General Chemistry》2007,77(6):1078-1085
Inner-sphere replacement of alcohols by imidazole and its derivatives in the complex (acetato)-(tetraphenylporphyrinato)chromium(III) was studied by electronic absorption spectroscopy. The rate constants and activation parameters of the process were calculated. The entering ligand structure was shown to affect the reaction rate, while the alcohol nature (departing ligand) does not influence the kinetic parameters of the process to an appreciable extent. Regression analysis revealed participation of imidazole and ethanol in the rate-determining stages. The kinetic equation for the inner-sphere axial substitution implies interaction of a free alcohol molecule with that coordinated to chromium, followed by replacement of the associate by the heteroring. Mathematical processing of the kinetic data in terms of the proposed solvolytic association-dissociation mechanism gave the rate constants for particular stages of the process and showed an extremal relation between the rate constant and composition of the solvent. 相似文献
853.
854.
P. Spacu C. Gheorghiu M. Constantinescu I. Pascaru O. Contantinescu 《无机化学与普通化学杂志》1971,384(2):184-190
Copper(II) coordination compounds with p-chlorphenylbiguanide of the type: [Cu(Cl-PhBig)2]X2 and [Cu(Cl–PhBig)X2] with X =Cl?, Br? NO3, OH?, NCS?, NCO?, N3, have been studied by EPR spectroscopy using polycrytalline powders and solutions in DMF. The parameters of the EPR spectra have been used to estimate molecular orbital coefficient, in these compounds and to discuss details of the chemical bonding. 相似文献
855.
856.
857.
858.
G. A. Kliger O. A. Lesik V. P. Ryzhikov L. S. Gleb S. M. Loktev 《Russian Chemical Bulletin》1987,36(12):2644-2645
Conclusions 1-Pentanol, 1-dimethylaminopentane or 4-penten-1-o1, 1-pentanol, and 1,5-pentanediol are the major products of the hydroamination of tetrahydrofurfuryl alcohol by dimethylamine and the hydrogenation of this alcohol on a promoted, fused reduced iron catalyst.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2847–2849, December, 1987.The authors express their gratitude to V. G. Zaikin and A. I. Mikaya for assistance in interpreting the mass spectral data. 相似文献
859.
860.
G. T. Pilyugin Ya. O. Gorichok B. M. Gutsulyak S. I. Gorichok 《Chemistry of Heterocyclic Compounds》1966,1(6):603-608
Reaction of phenyl-ß-naphthylamines with formaldehyde and acetone in the presence of HCl and nitrobenzene in butanol solution leads to cyclization involving the naphthalene and phenyl rings, and formation of N-aryllepidine salts. 15 lepidine and 5, 6-benzoepidine salts are synthesized and characterized by their UV absorption spectra, as well as by their picrates.For Part LIII see [3]. 相似文献