- MAIN GROUP METAL CHEMISTRY. REACTION OF 3,3-DIALKYL-1-BROMOALLENES WITH ALUMINIUM, ZINC, AND MAGNESIUM REAGENTS
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The reactions between 1-bromo-3-methyl-1,2-pentadiene and isobutyl compounds of main group metals (Al, Zn, Mg) provide reduction, elimination, and alkylation products with chemo- and regioselectivity depending on the nature of the organometallic reagent.
- Caporusso, Anna Maria,Lardicci, Luciano,Settimo, Federico da
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p. 599 - 602
(2007/10/02)
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- Untersuchungen zur Kinetik und zum Mechanismus der Addition von Methylradikalen an Vinylacetylen
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The addition of methyl radicals to vinylacetylen has been studied at 573 K.The methyl radicals were produced by thermolysis of azomethane.The attack occurs exclusively in the terminal positions and predominantly at the triple bond.The value of the rate constant amounts to k2.1 + k2.2 = 5.1E6 l mol-1s-1.The main steps and the formed types of radicals are deduced from the stable products.Without azomethane vinylacetylene is consumed by a slow conversion of second order.The activation parameters of this dimerisation were estimated at 553-593 K.
- Scherzer, K.,Claus, P.,Karwath, M.
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p. 321 - 328
(2007/10/02)
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