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- determine the limiting reaction in the following sn2 reaction given 2.00mmol of sodium saccharin and 0.16mL of iodoethane. yielding product of 0.151g N-ethylsaccharinFor 20.7 the solutions for part c and d dont seem right. Shouldn't reacting with 1 eq of H2 just take away the C=C bond and not the C=O bond. (H2 reduces C=C selectively to form a ketone according to page 738. Also the both the C=C and C=O bond should be reduced if excess H2 is usedPlease help with the following Organic Chemistry reaction problem. Thank you.
- an alkene when acting with HCl shows a weight increase of 52.14% .What is the molecular formula of the alkene?Calculate the % yield-show work in a clear organized matter-be aware of significant figures. Which is the limiting reagent? A Freidel – Crafts Alkylation Name_______________ Data: Alkyl chloride used________tert-butyl chloride___________________________________ Mass alkyl chloride____15.7549 g_______________________________________ Mass 1,4-dimethoxybenzene_____5.0035 g_______________________________ Mass product isolated____2.7834 g______________________________________ Appearance of product__________dry snow white solid________________________________ m.p. rextal product__101 deg Celsius ____________________________________________ Published m.p. product____102-104 o C_____________ source____Chemspider________________ Name of product__1,4-di-tert-butyl-2,5-dimethoxybenzene._______________________________________________4) Why might a student obtain a percent yield more than 100% for this preparation?
- 1pentanol + NaBr/H2SO4 -> 1-bromopentane Limiting reagent: 1-Pentanol Percent Yield: 64.5% The typical yield for this reaction is about 80%. Compare this to the yield attained..What issues might account for the yield being lower than expected?Assuming a 56.8% yield, how kany ml of alkene is required to produce 22.5 mL of 2,3-dimethyl-2-butanol? MW of alkene: 84.16, d: 0.653 MW of 2,3-dimethy-2-butanol: 102.17, d:0.823Cromolyn sodium, developed in the 1960s, has been used to prevent allergic reactions primarily affecting the lungs, as, for example, exercise-induced emphysema. It is thought to block the release of histamine, which prevents the sequence of events leading to swelling, itching, and constriction of bronchial tubes. Cromolyn sodium is synthesized in the following series of steps. Treatment of one mole of epichlorohydrin with two moles of 2,6-dihydroxyacetophenone in the presence of base gives I. Treatment of I with two moles of diethyl oxalate in the presence of sodium ethoxide gives a diester II. Saponification of the diester with aqueous NaOH gives cromolyn sodium. Q.Propose a mechanism for the formation of compound I.
- Cromolyn sodium, developed in the 1960s, has been used to prevent allergic reactions primarily affecting the lungs, as, for example, exercise-induced emphysema. It is thought to block the release of histamine, which prevents the sequence of events leading to swelling, itching, and constriction of bronchial tubes. Cromolyn sodium is synthesized in the following series of steps. Treatment of one mole of epichlorohydrin with two moles of 2,6-dihydroxyacetophenone in the presence of base gives I. Treatment of I with two moles of diethyl oxalate in the presence of sodium ethoxide gives a diester II. Saponification of the diester with aqueous NaOH gives cromolyn sodium. Q.Propose a structural formula for compound II and a mechanism for its formation.Cromolyn sodium, developed in the 1960s, has been used to prevent allergic reactions primarily affecting the lungs, as, for example, exercise-induced emphysema. It is thought to block the release of histamine, which prevents the sequence of events leading to swelling, itching, and constriction of bronchial tubes. Cromolyn sodium is synthesized in the following series of steps. Treatment of one mole of epichlorohydrin with two moles of 2,6-dihydroxyacetophenone in the presence of base gives I. Treatment of I with two moles of diethyl oxalate in the presence of sodium ethoxide gives a diester II. Saponification of the diester with aqueous NaOH gives cromolyn sodium. Q. Is cromolyn sodium chiral? If so, which of the possible stereoisomers are formed in this synthesis?What is the limiting reagent in the reaction below?
