- 77Se NMR. Application of JSe-Se to the Analysis of Dialkyl Polyselenides
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Elemental selenium is partially reduced via either disproportionation or reaction with sodium methanolate and hydrazine in dipolar aprotic media.These reductions both give polyselenide ions with a known average chain length, Sen(2-) (3 /= n /
- Eggert, Hanne,Nielsen, Ole,Henriksen, Lars
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p. 1725 - 1730
(2007/10/02)
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- Nuclear Heptylation of Benzene and Naphthalene and Cyclopentylation of Toluene
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Thermal decomposition of 1-, 2-, 3- and 4-heptyltoluene-p-sulphonates in the presence of aromatic substrates like benzene or naphthalene at 130-35 deg, affords differently substituted α- and β-isomers in the case of naphthalene.Skeletal isomerisation of the alkyl group is observed where different isomeric 1-, 2-, 3- and 4-heptyl-aromatics are obtained.Also thermal decomposition of cyclopentylmethane sulphonate in the presence of toluene at 130-35 deg, furnishes the corresponding o-, m- and p-substituted toluenes.The isomers have been identified and estimated quantitatively by GLC.
- Badr, M. Z. A.,El-Naggar, G. M.,Aly, M. M.,Fahmy, A. M.
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p. 961 - 964
(2007/10/02)
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