Discussion Questions On Diels-Alder Reactions

The mass of ascorbic acid neutralized is given by multiplying the calculated moles of ascorbic acid used (0.00235128 mol) with the molas mass of ascorbic acid (176.1 g/mol).

2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation?

43. If 750 milliliters of oil were poured from the 4.75 liter container, how many liters of oil remain.

Grignard reagents are reactive enough to also attach esters; however, two equivalents of the Grignard reagent are usually added because less then two equivalents leave a large quantity of unreactive ester. This reaction forms a tertiary alcohol.

The Diels-Alder reaction was discovered and named after the Nobel Prize winning scientists Kurt Alder and Otto Diels in 1928. Such a reaction occurs when a diene with two adjacent double bonds is mixed with a dienophile consisting of a double bond in order to create a cyclohexene. The diene must be in the s-cis conformation in order for the electron transfer to engage correctly. If the diene in question is in s-trans conformation then the access to the molecules is limited, thus, no reaction can occur. The dienophile we used was maleic anhydride. Maleic anhydride possesses high electron withdrawing characteristics which caused a very quick reaction. The reaction will

After 10 minutes the reaction liquid was separated from the solid using a vacuum filtration system and toluene. The product was stored and dried until week 2 of the experiment. The product was weighed to be 0.31 g. Percent yield was calculated to be 38.75%. IR spectra data was conducted for the two starting materials and of the product. Melting point determination was performed on the product and proton NMR spectrum was given. The IR spectrum revealed peaks at 1720 cm-1, which indicated the presence of a lactone group, and 1730 cm-1, representing a functional group of a carboxylic acid (C=O), and 3300cm-1, indicating the presence of an alcohol group (O-H). All three peaks correspond with the desired product. A second TLC using the same mobile and stationary phase as the first was performed and revealed Rf Values of 0.17 and 0.43for the product. The first value was unique to the product indicating that the Diels-Alder reaction was successful. The other Rf value of 0.43 matched that of maleic anhydride indicating some

7. In a procedure developed to determine the percent zinc in post 1982 pennies, 50 ml of an HCl solution was used to react (dissolve) all of the zinc in the penny. To ensure complete reaction, the solution contains twice as many moles of HCl that is actually needed. What concentration of HCl should be used?

Write a balanced chemical equation for each reaction #1-8. Classify each reaction using the information provided in the

The purpose of this experiment is to examine the reactivities of various alkyl halides under both SN2 and SN1 reaction conditions. The alkyl halides will be examined based on the substrate types and solvent the reaction takes place in.

The Diel-Alder reaction is a concerted cycloaddition between a diene and a dienophile. The first people to investigate this were Otto Diels and Kurt Alder, they were able to reported large variety of the dienes which turned out to be useful and so the procedure was named after them. This method is an efficient way to build rings that are stereospecific. A Diel-Alder reaction involves cyclic rearrangement of bonding electrons and forming and breaking bond(s) simultaneously.

The major product of this reaction is endo version of cis-Norbornene-5, 6-endo-dicarboxylic anhydride. The technique in this lab are applied by companies of the pharmaceutical industries. The use of Diels-Alders to construct rings for compositions of different drugs and medicines.

This was calculated by dividing the molality determined in step one by 20 mL of water solvent. The volume was converted by knowing that 1 L = 1 kg. With this, the volume was determined by dividing 20 mL by 1000 mL to get .02 L This allowed for both kg units to cancel out and to only leave moles of solute. The number of moles calculated for unknown 1 was .0101 moles and for unknown 2 it was .0155 moles. In the final step, the molecular weight was calculated for both unknown by dividing 1.5 by the moles in step two.

No. of mole of (histidine)- after reacting with the remaining OH- = 0.0004-0.0002 = 0.0002

To prepare 50.0 mL of 5.30 x 10-2 M solution from Warfarin and water one needs exactly .875 grams (which is calculated by converting the 50.0mL to liters and multiplying the liters with the molarity over one liter to cancel out the liters. Then the molarity from that answer gets multiplied to the grams of the drug over one mole which gives the answer .875) of the drug on a

1.50 "mL methyl-benzoate "×(1.094 "g methyl-benzoate " )/"mL methyl-benzoate " ×(1 "mol methyl-benzoate " )/(136.15 "g methyl-benzoate " )