24 juil. 2006 Experimental Organic Chemistry: A Miniscale and Microscale ... 3-sulfolene will be heated to produce 13-butadiene and SO2 gas.
Balmer 1. Introduction: The purpose of this experiment is to carry out a Diels-Alder FIGURE 1 The decomposition of 3-sulfolene to produce 13-butadiene.
Figure 2: Suggested transition state structure for this experiment. 3-sulfolene to give 1 3-butadiene (shown in Figure 3) is described as a chelotropic ...
Readily available 3-sulfolene (25-dihydrothiophene 5a-i gives the corresponding cycloadducts 6a-i in. 1
dioxide to produce 3-sulfolene (25-dihydrothiophene-1
23 juil. 2007 There were no significant side reactions for this experiment since the 13-butadiene was produced directly from 3- sulfolene and therefore would ...
An undergraduate laboratory experiment rapid performance of a simple Diels-Alder experiment ... dioxidejand pure 13-butadiene upon moderate heating.
ethylene (called the dienophile) to a 13-butadiene (the diene) to give In this experiment
thermal decomposition of sulfolene 3 is also stereo- specific and gives trans- 13-pentadiene (6).13
produce chemical shift dif- ferences. As shown in VII achieved by spin-decoupling experiments. ... 1 and 3 produced by heating a basic solution of 1 to.
In this experiment 3-sulfolene will be heated in the presence of the dienophile maleic anhydride The released butadiene from the retro Diels-Alder reaction will react with the dienophile to form an adduct cis -4-cyclohexene-12-dicarboxylic anhydride
We will be using 3-sulfolene in our Diels-Alder reaction 3-Sulfolene thermally decomposes to give the 13-butadiene reactant as shown in Figure 2: Figure 2 Thermal decomposition of 3-sulfolene to 13-butadiene Procedure Into a 25 mL round-bottom flask combine 2 0 g 3-sulfolene 1 2 g powdered maleic anhydride and a ½” stirbar
Experimental Procedure : 3-sulfolene (2 53g) maleic anhydride (1 46g) and dry xylene (1 0mL) were placed in a 25mL round bottom flask with a magnetic stir bar A reflux apparatus was assembled with a gas trap (Fig 4) from faucet to gas trap to faucet FIGURE 4 Reflux apparatus connected to an Erlenmeyer-flask gas trap
The purpose of this lab is to demonstrate the formation of six-membered ring s by a cyclo addition reaction 3-sulfolene will be heated to produce 13-butadiene and SO2 gas The 13-butadiene will be reacted with maleic anhydride to produce 4-cyclohexene-cis-12-dicarboxylic anhydride The anhydride will be hydrated to produce the diacid
5 3-sulfolene and maleic anhydride should be completely dissolved in xylene before heating the mixture to effect reaction because failure to do so will lower the yield of the reaction significantly because the butadiene will distill out of the solution before it has an opportunity to react with the maleic anhydride 6
3-Sulfolene as an alternative reactant for 13-butadiene in diene syntheses has the following advantages: (1) it is practically nontoxic and presents no particular flammability hazard; (2) it is an odorless crystalline nonhygroscopic solid which may be stored without inhibitor at ordinary temperatures for years with no evidence of