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V. A. Dodonov Yu. L. Kuznetsova M. A. Lopatin A. A. Skatova 《Russian Chemical Bulletin》2004,53(10):2209-2214
The polymerization of methyl methacrylate initiated by dicyclohexyl peroxydicarbonate at 30 °C was studied in the presence of tri-n-butylboron and a series of quinones, namely, p-benzoquinone, chloranil, and 2,5-di-tert-butyl-p-benzoquinone, whose concentration changed from 0.25 to 2.00 mol.%. The initial polymerization rate and molecular weight of poly(methyl methacrylate) depend on the structure and concentration of quinone. The growth radicals react with p-benzoquinone and chloranil predominantly at the C=C bond, while they react at the C=O bond of 2,5-di-tert-butyl-p-benzoquinone. The terminal stable oxygen-centered radicals that formed react with alkylborane, terminating reaction chains and generating alkyl radicals into the bulk. The latter are involved in chain initiation.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2114–2119, October, 2004. 相似文献
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M. V. Moskalev A. A. Skatova V. A. Chudakova N. M. Khvoinova N. L. Bazyakina A. G. Morozov O. V. Kazarina A. V. Cherkasov G. A. Abakumov I. L. Fedushkin 《Russian Chemical Bulletin》2015,64(12):2830-2840
Digallane (dpp-bian)Ga—Ga(dpp-bian) (1) (dpp-bian is the 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) catalyzes the addition of 4-chloroaniline to some terminal alkynes RC≡CH (R = Bun, Ph, 4-MeC6H4). The reaction orders in each of the substrates were found for the reaction of phenylacetylene with 4-chloroaniline catalyzed by compound 1. The reaction of compound 1 with phenylacetylene in a molar ratio of 1: 10 led to 1-[N-(2,6-diisopropylphenyl)imino]-2-(1-phenylethylidene)acenaphthene (5) and the compound [C12H6(NC6H3Pr2 i)(PhC=CH2)(PhC=CH)]Ga(C≡CPh)2 (6). The reaction of digallane 1 with phenylacetylene and aniline in a stoichiometric ratio of 1: 2: 2 gave bis-anilide (dpp-bian)-Ga[N(H)Ph]2 (7) in 40% yield. The compound (PhC≡C)3Ga·THF (9) was obtained by the reaction of three equivalents of sodium phenylacetylide (prepared in situ from phenylacetylene and sodium) with one equivalent of GaCl3 in tetrahydrofuran. Compounds 5—7 and 9 were characterized by IR spectroscopy, 1H NMR spectroscopy was used to characterize products 5, 6, and 9, whereas EPR spectroscopy was used for amide 7. The structures of compounds 5—7 and 9 were determined by single crystal X-ray diffraction analysis. 相似文献
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D.?S.?Yambulatov А.?А.?Skatova A.?V.?Cherkasov I.?L.?FedushkinEmail author 《Russian Chemical Bulletin》2017,66(7):1187-1195
The reduction of 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-bian) with an excess of europium metal in 1,2-dimethoxyethane (dme) produces a divalent europium complex with the dpp-bian dianion, [(dpp-bian)Eu(dme)2] (1). The reactions of 1 with phenyl-acetylene and camphor proceed via protonation of the diimine ligand to form the monomeric amido-amino complexes of divalent europium — [H(dpp-bian)Eu(C≡CPh)(dme)2] (2) and [H(dpp-bian)Eu(camphor)(dme)2] (3), respectively. Compounds 2 and 3 were characterized by IR spectroscopy and elemental analysis. Their molecular structures were determined by X-ray diffraction. Compounds 2 and 3 were shown to be monomeric seven-coordinate europium(ii) complexes with terminal phenylethynyl and enol ligands, respectively. According to the IR spectroscopic data, the terminal ligands in complexes 2 and 3 undergo tautomerization involving backward proton transfer from the amido-amino ligand to the substrate. The magnetic moment of compound 2 (8.03 μB) remains constant in the temperature range of 4—300 К and confirms the presence of divalent europium. 相似文献
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L. N. Bochkarev A. V. Nikitinskii A. A. Skatova Yu. E. Begantsova V. I. Shcherbakov I. P. Malysheva G. V. Basova G. K. Fukin Yu. A. Kurskii S. Ya. Khorshev Yu. P. Barinova G. A. Abakumov 《Russian Chemical Bulletin》2005,54(3):606-609
New silicon-, germanium-, and tin-containing imido-alkyl molybdenum complexes (ArN)2Mo(CH2EMe3)2 (Ar is 2,6-diisopropylphenyl; E = Si (1), Ge (2), Sn (3)) were prepared in the crystalline state in 58–66% yields by the reactions of the (ArN)2MoCl2(DME) complex with alkyllithium derivatives Me3ECH2Li (E = Si or Ge) or the Grignard reagents Me3ECH2MgCl (E = Ge or Sn). The structures of complexes 1–3 and the known analog (ArN)2Mo(CH2But)2 (4) were established by X-ray diffraction analysis. Complexes 1–3 were found to be isostructural. The coordination environment about the Mo atom can be described as a distorted tetrahedron. Complex 4 has a similar structure. The Mo-C distance tends to decrease with increasing electron donating ability of the EMe3 group.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 597–600, March, 2005. 相似文献
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Igor L. Fedushkin Prof. Dr. Alexandra A. Skatova Olga V. Eremenko Markus Hummert Herbert Schumann Prof. Dr. 《无机化学与普通化学杂志》2007,633(10):1739-1742
The reaction of 1,2‐bis[(trimethylsilyl)imino]acenaphthene ( 1 , tms‐BIAN) with ZnCl2 and ZnI2 in THF and Et2O afford (tms‐BIAN)ZnCl2 ( 2 ) and (tms‐BIAN)ZnI2 ( 3 ), respectively. The compounds 2 and 3 were characterized by IR‐ and NMR spectroscopy as well as by single crystal X‐ray analysis. 相似文献
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Makarov V. M. Koptseva T. S. Sokolov V. G. Dodonov V. A. Skatova A. A. Baranov E. V. Fedushkin I. L. 《Russian Journal of Coordination Chemistry》2020,46(4):215-223
Russian Journal of Coordination Chemistry - The condensation reactions of 5-bromoacenaphthenequinone with 2,6-diisopropylaniline and 4?bromo-2,6-di-iso-propylaniline afford new mono- and... 相似文献
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I. L. Fedushkin A. A. Skatova N. L. Bazyakina V. A. Chudakova N. M. Khvoinova A. S. Nikipelov O. V. Eremenko A. V. Piskunov G. K. Fukin K. A. Lyssenko 《Russian Chemical Bulletin》2013,62(8):1815-1828
The reduction of 1,2-bis(trimethylsilylimino)acenaphthene and 1,2-bis{[3,5-bis(trifluoromethylphenyl)]imino}acenaphthene with metals gave magnesium, calcium, europium, zinc, and gallium complexes containing radical-anion and dianionic ligands of the 1,2-diiminoacenaphthene type. Their structures were studied by 1H NMR, ESR, and/or single-crystal X-ray analysis. Some chemical transformations of the complexes were carried out. 相似文献
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Sokolov V. G. Lukina D. A. Skatova A. A. Moskalev M. V. Baranov E. V. Fedushkin I. L. 《Russian Chemical Bulletin》2021,70(11):2119-2129
Russian Chemical Bulletin - Reactions of the samarium complex [(ArBIG-bian)2?Sm2+] (1) (ArBIG-bian is the 1,2-bis-[(2,6-dibenzhydryl-4-methylphenyl)imino]acenaphthene dianion) with iodine... 相似文献