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what are some possible errors that can affect percent yield in the bromination of trans-stilbene?
What is the theoretical yield for the bromination of trans-Stilbene reaction? Setting up the experiment: 18mg of trans-Stilbene and 103mg of polymer supported brominating agent & 2mL chloroform Monitoring the experiment: 5mg of trans-Stilbene in 1ml of Chloroform
Bromination of Stilbene Calculate the theoretical yield of meso-stilbene dibromide. Calculate the percent yield. 0.523 grams of trans stilbene, with 10 mL of ethanol, 1.2 mL of concentrated aqueous HBr, and 0.8 mL of 30% hydrogen peroxide. Final product weight of meso after experiment: 0.494 g.
What is a detailed mechanism for the bromination of trans-stilbene with Br2.
help with limiting reagents and percent yield needed the reactions are the bromination of cis-stilbene and trans-stilbene. The reagents and the moles of each reagent are in my data, as is the moles of the products formed. The volume and mass of the reagents are given as well. I need to know how to find the percent yield and what the limiting reagents are for both the trans and cis stilbene brominations. The information is there. Name Physical Properties of...
Below are three possible mechanisms for the bromination of trans-stilbene. All mechanisms are possible on paper. Study each mechanism and decide what the stereochemical outcome of each would be and draw the appropriate product (syn, anti, or a mix of both). Decide which mechanism is most consistent with your data from the experiment. This work should all be recorded in your lab notebook. . Mechanism A: Br-Br PhPh Mechanism B: Br-Br Br Ph Ph PhPh Mechanism C C-Br: :Br: :Br...
alswering these questions. 1. If the bromination of trans-stilbene proceeded by syn addition what isomer(s) of stilbene dibromide would be formed? 2. If the bromination of trans-stilbene proceeded by anti addition what isomer(s) of stilbene dibromide would be formed? 3. Which isomer(s) of stilbene dibromide would be formed if the reaction followed Mechanism 4? Mechanism 4: Bromination is a multi-step process. In this mechanism, the pi bond attacks the bromine molecule as in Mechanism 1. Some time after the carbocation...
So we are doing a Green Bromination of Stilbene and need to calculate the percent yield of the reaction Percent yield of 1,2-dibromo-1,2-diphenylethane the starting material: molecular weight =66g/mol starting mass = 1.28 g the product molecular weight= 164 g/mol At the completion of your reaction you isolated 2.61 g of your desired product. From the following information calculate the % yield of your reaction. Show your work and watch sigfigs!
Reaction Scheme for the bromination of trans-stilbene added with chloroform and TLCed with a hexane:ethyl acetate (4:1) solvent mixture
1) Write a stepwise mechanisms for the bromination of: a) trans-stilbene and b) cis-stilbene (substitute benzene rings by Ph-notation for convenience; e.g., stilbene could be written as Ph- CH=CH-Ph). I 2) Use (S) and (R) nomenclature to label all stereogenic centers in the above products (each has two stereogenic centers) in problem 1. Identify any enantiomers and meso-products. 3) Complete the following table including formula weights and grams and moles of reagents used in order to calculate a theoretical yield...
3. The previous mechanism was for the bromination of trans-stilbene. The next several questions Uy will refer to the same mechanism, but using cis-stilbene. i t a. Draw cis-stilbene. (3 pts) deb baho o o dston 50302- adi ola) obblehemsiz n 20 Bobong odib-1-modb- 023 YOYO MOY on yd behou om bb b. Draw the bromonium ion intermediate that would be obtained in the bromination of ubo cis-stilbene. (5 pts) 2012 mainsbemastr o na 5 18-18: 19 19. HP C....