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5 pleaseHomework Answers
Molar mass of trans-stilbene = 180.24 g/mol
Moles of trans-stilbene = (0.4 g)/(180.24 g/mol)
= 0.00222 mol
Molar mass of pyridium tribromide = 319.82 g/mol
Moles of pyridium tribromide = (0.8 g)/(319.82 g/mol) = 0.00250 mol
Reaction indicated shows that equal moles of stilbene and pyridium tribromide.
0.00222 mol of trans-stilbene requires 0.00222 mol of pyridium tribromide.
So, pyridium tribromide is in excess.
Hence, trans-stilbene is limiting reagent.
It is so because trans-stilbene is less than required amount to react completely with pyridium tribromide.
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number
5 please
EXPERIMENT 8: BROMINATION OF TRANS-STILBENE glacial acetic acid Objective: Execute first step of...
number 5 please EXPERIMENT 8: BROMINATION OF TRANS-STILBENE Br3 Br glacial acetic acid Br Objective: Execute...
number
5 please
EXPERIMENT 8: BROMINATION OF TRANS-STILBENE Br3 Br glacial acetic acid Br Objective: Execute first step of two-step sequence to transform an alkene into an alkyne via a dihalide intermediate and use infrared spectros copy to identify functional groups 5. Identify the limiting reagent for the reaction and explain why it is the limiting reagent. PLEASE NOTE: You will need to draw out a Table of Reagents in your notebook to ensure that you know how many moles...
here is the procedure if needed EXPERIMENT 8: BROMINATION OF TRANS-STILBENE glacial acetic acid Objective: Execute...
here is the procedure if needed
EXPERIMENT 8: BROMINATION OF TRANS-STILBENE glacial acetic acid Objective: Execute first step of two-step sequence to transform an alkene into an alkyne via a dihalide intermediate and use infrared spectroscopy to identify functional groups PRELAB NOTEBOOK: In the laboratory notebook, write the overall experimental objective, chemical equation(s), reaction mechanism (consider all possible stereoisomers), draw a diagram or outline of the procedural steps, and complete the chemical safety table for all chemicals. 1. Why is...
help with limiting reagents and percent yield needed the reactions are the bromination of cis-stilbene and...
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...
1) Write a stepwise mechanisms for the bromination of: a) trans-stilbene and b) cis-stilbene (substitute benzene...
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...
please help do theoretical and percent yields Ce the reaction equation below. Note: consider the equilibriugarshown...
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)...
numbers 3-5 please Those are the three equations given to us and that is the reaction...
numbers 3-5 please
Those are the three equations given to us and that is the reaction
mechanism as well as the procedure. there is nothing else i can
give you
EXPERIMENT 9: SYNTHESIS OF DIPHENYLACETYLENE Objective: Complete the two-step halogenation/elimination reaction sequence that converts an alkene (trans- stilbene) to an alkyne (diphenylacetylene) 3. Why is it important that the reaction is performed in the presence of a strong base? 4. If the starting mass is 350 mg of stilbene dibromide,...
Organic Chemistry Addition of Bromine to an Alkene-HELP ASAP PLEASE table of reagents and properties Reagent &n
Organic Chemistry Addition of Bromine to an Alkene-HELP ASAP PLEASE table of reagents and properties Reagent MW (g/mol) mp(Celsius) d( g/ml) trans-cinamic acid 148.2 132-135 acetic acid 60 1.05 pyridinium tribromide 319.8 - 2,3-dibromo-3-phenylpropanoic acid 308.0 Pair A: 93-95, Pair B: 202-204 Organic Chemistry- addition of bromine to an Alkene For a lab the preparation of 2,3-dibromo-3 phenylpropanoic acid was done. 1.2 g of trans-cinnamic acid was dissolved in 4 ml of glacial acetic acid. 2.5 g of pyrimide tribromide...
I need help with #2 please explain step by step. POST LAB QUESTIONS 1. Predict all possible bromination products of...
I need help with #2 please explain step by step.
POST LAB QUESTIONS 1. Predict all possible bromination products of the following substrate using the above reaction conditions. Show stereochemistry (i.e. dashed and wedged bonds, and label chiral centers (R or S), if necessary. Dogou or dilbi o bando sobre in the manica Br2 YCHE CH3 2. A researcher performs the above reaction starting with 0.150 g of the alkene substrate, 0.375 g of pyridinium tribromide, and 2.00 mL of...
please help with filling out this table and answering 8 questions Data Table Br H CH2CH3OH...
please help with filling out this table and answering 8
questions
Data Table Br H CH2CH3OH N-H Bry Chemicals H (E)-Stilbene Ethanol Pyridinium tribromide CsH.Br3N Stilbene Dibromide C14H12Br2 Molecular Formula C14H12 CHO Molecular Weight 180.25 g/mol 46.07 g/mol 319.82 g/mol 340.06 g/mol Physical Properties White solid Clear liquid White solid White solid Melting Point 122-124 °C N/A 127-133 °C 241-243 °C Amount needed 0.25 g 10 mL 0.5 g Mole needed 1.39 mmol 1.56 mmol Amount Used Moles Used Amount...
What is the theorectical yeild for step 1 and step 3? - Step 1 has 0.76g...
What is the theorectical yeild for step 1 and step 3?
- Step 1 has 0.76g of ortho-vanillin and 0.535g of
para-toludine.
-step 3 has 2ml of glacial acetic acid and 2ml of acetic
anhydride. it gets warms and 75ml of water is added
Step 1: Synthesis of 2-methoxy-6-(p-tolyliminomethyl)-phenol: Imine formation Weigh a 250 mL beaker and then add 0.76 grams (5 mmol) of ortho-vanillin to one side of the beaker. Record the total mass of the beaker plus the...
number
5 please
EXPERIMENT 8: BROMINATION OF TRANS-STILBENE Br3 Br glacial acetic acid Br Objective: Execute first step of two-step sequence to transform an alkene into an alkyne via a dihalide intermediate and use infrared spectros copy to identify functional groups 5. Identify the limiting reagent for the reaction and explain why it is the limiting reagent. PLEASE NOTE: You will need to draw out a Table of Reagents in your notebook to ensure that you know how many moles...
here is the procedure if needed
EXPERIMENT 8: BROMINATION OF TRANS-STILBENE glacial acetic acid Objective: Execute first step of two-step sequence to transform an alkene into an alkyne via a dihalide intermediate and use infrared spectroscopy to identify functional groups PRELAB NOTEBOOK: In the laboratory notebook, write the overall experimental objective, chemical equation(s), reaction mechanism (consider all possible stereoisomers), draw a diagram or outline of the procedural steps, and complete the chemical safety table for all chemicals. 1. Why is...
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...
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...
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)...
numbers 3-5 please
Those are the three equations given to us and that is the reaction
mechanism as well as the procedure. there is nothing else i can
give you
EXPERIMENT 9: SYNTHESIS OF DIPHENYLACETYLENE Objective: Complete the two-step halogenation/elimination reaction sequence that converts an alkene (trans- stilbene) to an alkyne (diphenylacetylene) 3. Why is it important that the reaction is performed in the presence of a strong base? 4. If the starting mass is 350 mg of stilbene dibromide,...
I need help with #2 please explain step by step.
POST LAB QUESTIONS 1. Predict all possible bromination products of the following substrate using the above reaction conditions. Show stereochemistry (i.e. dashed and wedged bonds, and label chiral centers (R or S), if necessary. Dogou or dilbi o bando sobre in the manica Br2 YCHE CH3 2. A researcher performs the above reaction starting with 0.150 g of the alkene substrate, 0.375 g of pyridinium tribromide, and 2.00 mL of...
please help with filling out this table and answering 8
questions
Data Table Br H CH2CH3OH N-H Bry Chemicals H (E)-Stilbene Ethanol Pyridinium tribromide CsH.Br3N Stilbene Dibromide C14H12Br2 Molecular Formula C14H12 CHO Molecular Weight 180.25 g/mol 46.07 g/mol 319.82 g/mol 340.06 g/mol Physical Properties White solid Clear liquid White solid White solid Melting Point 122-124 °C N/A 127-133 °C 241-243 °C Amount needed 0.25 g 10 mL 0.5 g Mole needed 1.39 mmol 1.56 mmol Amount Used Moles Used Amount...
What is the theorectical yeild for step 1 and step 3?
- Step 1 has 0.76g of ortho-vanillin and 0.535g of
para-toludine.
-step 3 has 2ml of glacial acetic acid and 2ml of acetic
anhydride. it gets warms and 75ml of water is added
Step 1: Synthesis of 2-methoxy-6-(p-tolyliminomethyl)-phenol: Imine formation Weigh a 250 mL beaker and then add 0.76 grams (5 mmol) of ortho-vanillin to one side of the beaker. Record the total mass of the beaker plus the...
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