Reactions of dichloromethane with chalcogens and dimethyl chalcogenides in the hydrazine hydrate-alkali system
摘要:
Methods of synthesis of compounds MeY(CH2Y)(n) Me (Y=S, Se, Te; n = 1-3) containing several identical or different chalcogen atoms are suggested. The methods are based on the reactions of dichloromethane with elemental chalcogens (Y2-) and dimethyl dichalcogenides (MeY-) activated in the system hydrazine hydrate-alkali. The effect of the chalcogen on the reactivity toward dichloromethane is qualitatively assessed. With elemental tellurium in the system hydrazine hydrate-alkali, reduction of one chlorine atom in dichloromethane and formation of methyltellanyl derivatives are observed.
Reactions of dichloromethane with chalcogens and dimethyl chalcogenides in the hydrazine hydrate-alkali system
摘要:
Methods of synthesis of compounds MeY(CH2Y)(n) Me (Y=S, Se, Te; n = 1-3) containing several identical or different chalcogen atoms are suggested. The methods are based on the reactions of dichloromethane with elemental chalcogens (Y2-) and dimethyl dichalcogenides (MeY-) activated in the system hydrazine hydrate-alkali. The effect of the chalcogen on the reactivity toward dichloromethane is qualitatively assessed. With elemental tellurium in the system hydrazine hydrate-alkali, reduction of one chlorine atom in dichloromethane and formation of methyltellanyl derivatives are observed.
Synthesis of diselenides and selenides from elemental selenium
作者:Alain Krief、Michel Derock
DOI:10.1016/s0040-4039(02)00277-0
日期:2002.4
Sodium hydride is able to reduce elemental selenium to sodium diselenide (Na2Se2), but not to sodium selenide (Na2Se). Dialkyl diselenides and even dialkyl selenides, including unsymmetrical dialkyl selenides, can be nevertheless synthesized using the proper Se/NaH ratio (1/1 or 1/2).
氢化钠能够将元素硒还原为二硒化钠(Na 2 Se 2),但不能还原为硒化钠(Na 2 Se)。尽管如此,仍可以使用适当的Se / NaH比(1/1或1/2)合成二烷基二硒化物,甚至二烷基硒化物,包括不对称的二烷基硒化物。
Reactions of dichloromethane with chalcogens and dimethyl chalcogenides in the hydrazine hydrate-alkali system
作者:E. P. Levanova、V. Yu. Vshivtsev、E. N. Sukhomazova、V. A. Grabel’nykh、N. V. Russavskaya、E. R. Zhanchipova、L. V. Klyba、A. I. Albanov、N. A. Korchevin
DOI:10.1134/s1070363208090156
日期:2008.9
Methods of synthesis of compounds MeY(CH2Y)(n) Me (Y=S, Se, Te; n = 1-3) containing several identical or different chalcogen atoms are suggested. The methods are based on the reactions of dichloromethane with elemental chalcogens (Y2-) and dimethyl dichalcogenides (MeY-) activated in the system hydrazine hydrate-alkali. The effect of the chalcogen on the reactivity toward dichloromethane is qualitatively assessed. With elemental tellurium in the system hydrazine hydrate-alkali, reduction of one chlorine atom in dichloromethane and formation of methyltellanyl derivatives are observed.