Calculate the theoretical yield of the product, 1,2-dibromo-1,2-diphenylethane, if 0.400 g of (E/Z) stilbene and 0.800 g of pyridinium tribromide were used in the reaction.
Calculate the theoretical yield of the product, 1,2-dibromo-1,2-diphenylethane, if 0.400 g of (E/Z) stilbene and 0.800...
A lab was done for the bromination of E-stilbene to create 1,2-dibromo-1,2-diphenylethane. In this lab, E-stilbene and pyridinium tribromide were reacted together, using acetic acid as a solvent. The question being asked is "what is a possible by-product that could occur as a consequence of the use of acetic acid as a solvent?" NOTE: I am NOT asking what the main product is or what the mechanism is, as I already know how 1,2-dibromo-1,2,diphenylethane is produced. The question is what...
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!
meso-stilbene dibromide when 0.90 g of E-stilbene are reacted 6.(4) Calculate the theoretical yield of meso-stilbene dibromide when 0.90 with excess bromine. 70) Write the structure of the product obtained when cyclohexene is used to decolorize bromine. containing solutions. Br Bra
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.
1. (4 pts) Given the masses of meso-stilbene dibromide and potassium hydroxide, please calculate the theoretical yield of the expected reaction product, diphenylacetylene, in grams. Your final answ appear in the box provided, or it will not be counted. Show all work to receive credit. Br +KOH + KOH Br diphenylacetylene meso-stilbene dibromide Molecular Weight (g/mol) 340.058 g/mol 56.105 g/mol mass (grams) 178.234 g/mol 0.800 g 0.400 g
please help do theoretical and percent yields Ce the reaction equation below. Note: consider the equilibriugarshown on p. 42 of your lab manual. Acetic id mesb-Shibanc tribromide o Bra Pyridinium tribromide E-stilbene meso-stibene dibromide step 2 Step 2: +86:0 Stepa. 2. Complete the following table, using your actual measured amounts. Greyed-out cells do not need to be filled. E-stilbene mp bp MW vol mass (°C) (C) (g/mol) (ml) (mg) mmol equiv 122- 180.25 125 ,0560.0032,094 118 IML acetic acid (glacial)...
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...
lab G: (e)- stilbene, pyridinium tribromide, meso-stilbene dibromide, potassium hydroxide, triethylene glycol, diphenylacetylene, ethanol Mole Table Drawn immediately beneath the Overall Reaction, the Mole Table is used to calcu late the theoretical yield of your product using stoich iometry. All calculations are to be shown in the "Calculations" section. Each column refers to the structure drawn above it. Please cite the source of Mole Table information stated in the Mole Table - refer to the example below for format. As...
Synthesis Based Experiment 1: Free Radical Bromination of 1,2-Diphenylethane 1. If the R,R and S,S enantiomers of 1,2-dibromo-1,2-diphenylethane have an observed melting point range of 113 -114'C and the meso 1,2-dibromo-1,2-diphenylethane has an observed melting point range of 236-237 C, which stereoisomer did you isolate? TLC 2. All three of these dibromo stereoisomers were produced in this reaction but you only isolated one of them. Explain this result taking into account the large differences in the three stereoisomers melting point...
0.8002 g of (E)-cinnamic acid, 10 mL of glacial acetic acid and 1.7610g of pyridinium tribromide was heated under reflux to demonstrate the bromination of (E)-cinnamic acid. The mass of the final product was 3.4143 g and the melting point range was 175.4-203.4 ℃. What is the theoretical yield, actual yield, percent yield? Please show work! (Pyridinium tribromide and cinnamic reaction react in a 1:1 ratio).