About: Trapp mixture

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The Trapp mixture is a specific mixture of organic solvents that allows chemical reactions to take place at very low temperatures. It is made up of THF:diethyl ether:pentane in a 4:4:1 ratio which remains liquid down to −110 °C and the same solvents in a 4:1:1 ratio remain a liquid down to −120 °C. This solvent system retains a low viscosity until just before freezing and it allows a lower temperature reaction than pure THF, which melts at −108.4 °C. An illustrative application of Trapp solvent is the preparation of vinyllithium by lithium halogen exchange from vinyl bromide and tert-butyllithium. The low temperatures suppress the reaction of the strongly basic organolithium reagent with the THF.

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  • خليط تراب (بالإنجليزية : Trapp mixture ) عبارة عن خليط معين من المذيبات العضوية يستخدم في التفاعلات الكيميائية التي تحدث عند درجات الحرارة المنخفضة جداً . ويتكون هذا الخليط من (رباعي هيدرو فيوران THF : ثنائي إيثيل إيثر : البنتان) بنسبة (4 : 4 : 1) وهو سائل تصل درجة حرارته إلى - 110 ° م ، ونفس هذا الخليط بنسبة (4 : 1: 1) هو سائل تصل درجة حرارته إلى - 120 ° م . علماً بأن رباعي هيدرو فيوران النقي ينصهر عند - 108.4 ° م . (ar)
  • The Trapp mixture is a specific mixture of organic solvents that allows chemical reactions to take place at very low temperatures. It is made up of THF:diethyl ether:pentane in a 4:4:1 ratio which remains liquid down to −110 °C and the same solvents in a 4:1:1 ratio remain a liquid down to −120 °C. This solvent system retains a low viscosity until just before freezing and it allows a lower temperature reaction than pure THF, which melts at −108.4 °C. An illustrative application of Trapp solvent is the preparation of vinyllithium by lithium halogen exchange from vinyl bromide and tert-butyllithium. The low temperatures suppress the reaction of the strongly basic organolithium reagent with the THF. (en)
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  • خليط تراب (بالإنجليزية : Trapp mixture ) عبارة عن خليط معين من المذيبات العضوية يستخدم في التفاعلات الكيميائية التي تحدث عند درجات الحرارة المنخفضة جداً . ويتكون هذا الخليط من (رباعي هيدرو فيوران THF : ثنائي إيثيل إيثر : البنتان) بنسبة (4 : 4 : 1) وهو سائل تصل درجة حرارته إلى - 110 ° م ، ونفس هذا الخليط بنسبة (4 : 1: 1) هو سائل تصل درجة حرارته إلى - 120 ° م . علماً بأن رباعي هيدرو فيوران النقي ينصهر عند - 108.4 ° م . (ar)
  • The Trapp mixture is a specific mixture of organic solvents that allows chemical reactions to take place at very low temperatures. It is made up of THF:diethyl ether:pentane in a 4:4:1 ratio which remains liquid down to −110 °C and the same solvents in a 4:1:1 ratio remain a liquid down to −120 °C. This solvent system retains a low viscosity until just before freezing and it allows a lower temperature reaction than pure THF, which melts at −108.4 °C. An illustrative application of Trapp solvent is the preparation of vinyllithium by lithium halogen exchange from vinyl bromide and tert-butyllithium. The low temperatures suppress the reaction of the strongly basic organolithium reagent with the THF. (en)
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  • مزيج تراب (ar)
  • Trapp mixture (en)
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