a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry...
Look up and draw the mechanism for the addition of Br2 to double bonds. Reference the source from which you acquired the mechanism. Give the IUPAC name of the major product in the above-mentioned reaction. Draw the major product of obtained in the addition of Br2 to stilbene. Is this isomer chiral? What would be the optical rotation if this sample was placed in a polarimeter? Would a student obtain the same product if you started with cis-stilbene instead of...
Discussion Questions: 1. a) Carefully draw a three-dimensional structure of each stereoisomer of stilbene dibromide. Do not include any identical structures. b) Identify the enantiomeric pair, and identify one pair of structures that are diastereomers. 2. Give careful stereo-drawings representing the complete mechanism for the reaction of cis-stilbene with bromine. Remember to show the two different modes of anti-attack that are possible, depending on whether you add the bromine from above to the left-hand or the right-hand carbon of the...
2. Your lab manual proposes 3 possible mechanisms for bromination. During this lab, you will determine which iroduct(s) formed during the bromination of stilbene. (9 pts) a. Four possible products from the bromination of trans-stilbene are shown below. Label the chiral centers as Sor R. Ph Br Br H iph H Phil Br Ph Ph Br B. HINH Philiph Phí By HP b. The enantiomer of structure A is: c. The enantiomer of structure Dis: d. Ust the letters corresponding...
Electrophilic addition of bromine, Br-, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH2Cl2 In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product...
PLEASE HELP FAST!!! 1. Predict the major product of the reaction. Clearly indicate stereochemistry, if necessary (3 pts) H 1.9-BBN-H THE Me Me 2. NaOH H202 2. Provide reagents to achieve the shown multi-step transformations. (6 pts) H Me Me Br Br Me Br Br 3. Draw a detailed arrow-pushing mechanism for the following transformation. (4 pts) Ph Li(0) Ph Ph Ph NH30)
2P (a) Draw/predict the major elimination product(s) of the following proposed reaction. Be sure to indicate correct stereochemistry when appropriate in the product. (b) Provide a mechanism that describes the formation of your drawn product. Show how (Newman Projection) any stereochemistry within the mechanism/product results. CHз Br NAOCH3 "CH-CHз
1. Predict the major product of the reaction. Clearly indicate stereochemistry, if necessary (3 pts) Ph H2 Lindlar cat. hexanes Me 2. Provide reagents to achieve the shown multi-step transformations. (6 pts) Br CH 3. Draw a detailed arrow-pushing mechanism for the following transformation. (4 pts) OME B OMe Me Me NaOH H2O2 Me Me H
1. Predict the major product of the reaction. Clearly indicate stereochemistry, if necessary (3 pts) Н.С. Me 1. 9-BBN-H THF 2. NaOH H2O2 Me 2. Provide reagents to achieve the shown multi-step transformations. (6 pts) H Ph OH Ph. Br Br
6. Determine the mechanism of nucleophilic substitution for each reaction and indicate the stereochemistry of the products. (in WORDS - DON'T DRAW DRAW PRODUCT BUT NOT Stereochemistry A. Br Brt + CN-acetons B. Br or n + CH₃OH Hochz - + OCHCH DME> c. 7. Label each stereogenic center as Rors A. a c. HO B ...oh OH NH 8. How is each compound related to the first compound D-erythrose (A+B) Oh. HK CH OH 04 I CH -04 D-erythrose...
draw the structure of the major product of the following diels-alder reaction. clearly indicate relative stereochemistry. b) use resonance hybrid structures for regiochemistry (to explain it) What the product of the D-A reaction? Stereochemistry (1enantiome) Explain regiochemistry using resonance hybrid structured