Describe the mechanism for the reduction of an alkyne using a dissolving metal reduction. A) What...
Describe the mechanism for the reduction of an alkyne using a dissolving metal reduction.
A) What is unique about this mechanism which we have not seen in any previous mechanism covered in this course?
B) Why is it that this mechanism is stereoselective?
C) What causes it to form only the trans alkene and not the cis?
Homework Answers
A) This mechanism involves the formation of a radical -anion intermediate.
B) The repulsion between the single electron and the lone pair of electrons forces them to go opposite sides of double bond, thus making only trans product , hence the reaction becomes stereoselective.
C) the electronic repulsions.
Add Answer to:
Describe the mechanism for the reduction of an alkyne using a
dissolving metal reduction.
A) What...
Bonding and Molecular Geometry Both the alkene C4Hs and the alkyne CaHe have rigid bond structures....
Bonding and Molecular Geometry Both the alkene C4Hs and the alkyne CaHe have rigid bond structures. However, С«Hs con form three isomers whereas С.H6 can form only two isomers, why is this so? 4. 5. Are these molecules isomers? Why or why not? 6. which of the following molecules are geometric isomers, and which are structural isomers? Which molecule is in the trans position and which is in the cis position? H,C-CH H CH-CH-CH-CH, H-CHCH CH, 7. The skeletal model...
You start thinking about the mechanism of carbonic anhydrase. Describe what role the metal(mercury) plays in...
You start thinking about the mechanism of carbonic anhydrase. Describe what role the metal(mercury) plays in the reaction and the other type of catalysis present in carbonic anhydrase. Mercury was found to be an inhibitor in a previous question.
ChemActivity 10: Oxidation and Radu 11. Draw the major organic product of each of the following...
ChemActivity 10: Oxidation and Radu 11. Draw the major organic product of each of the following reactions (always assume exces | Họcác TC–CH, - Model 5: Reduction of Alkynes H, and Pt or Pd metal will reduce both it bonds of a triple bond; however, careful use of a weaker catalyst (e.g. Lindlar catalyst) will reduce only one bond, giving either a cis or trans alkene. Synthetic Transformations 10.3-10.5: Stereoselective Alkyne Reductions H/Pt or Pd metal 107 R-cac-R HH H2/Ni,B...
4.(18 points) Using the arrow, provide the detailed reaction conditions necessary to give the following. You...
4.(18 points) Using the arrow, provide the detailed reaction conditions necessary to give the following. You do not need to provide any starting material or product, just the reaction conditions (see example below) 1.B Example: Show reagent 'B' followed by aqueous acid: 2. H30 a. Markovnikov addition of H2O to a double bond: b. Anti-Markovnikov addition of H2O to a double bond: c. Markovnikov addition to form an alkyl bromide from an alkene: d. Reaction conditions to change 1,2-dimethylcyclohexene into...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products that can form on EACH face of the alkene. Here, we use trifluoro-per-acetic acid and (Z)-but-2-ene. [The important oxygen atom is filled in...] CF 2B) (CIRCLE ONE or more...) The above pair of epoxide possibilities are: enantiomers / diastereomers / conformers / identical / meso / entgegen / zusammen 2C) (CIRCLE ONE) How many stereochemical products can be formed in this specific particular reaction?...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products that can form on EACH face of the alkene. Here, we use trifluoro-per-acetic acid and (Z)-but-2-ene. [The important oxygen atom is filled in...) ÇF3 2B) (CIRCLE ONE or more...) The above pair of epoxide possibilities are: enantiomers / diastereomers / conformers / identical / meso / entgegen zusammen 2C) (CIRCLE ONE) How many stereochemical products can be formed in this specific, particular reaction? (That...
Stereochemistry of bromine addition 1) To investigate the mechanism for the addition of bromine to an...
Stereochemistry of bromine addition 1) To investigate the mechanism for the addition of bromine to an alkene, we will use the melting point of our brominated products. The three possible outcomes for this lab are to obtain 1)only the syn enantiomers, 2)only the anti enantiomers, or 3)a mixture of diastereomers. Match these possible outcomes to the three possible mechanisms described in the lab manual, bromonium ion, concerted Br2 activation, and carbonation 2) In this experiment we don't crystallize the final...
Chapter 11: 1. What is a prime rule in naming alkenes? a. Find the longest carbon...
Chapter 11: 1. What is a prime rule in naming alkenes? a. Find the longest carbon chain. b.Find the longest carbon chain containing the alkene. c. Find whether the alkene has a cis- or trans- configuration. d.Find how far the alkene functionality is from either end. 2. What is the IUPAC name of the following alkene? a. cis-5-methyl-2-heptene b. trans-2-ethyl-4-hexene c. trans-5-methyl-2-heptene d. trans-3-methyl-5-heptene 3. What is the hybridization, geometry, and bond angle of the carbon marked by an asterisk?...
How to solve alkene and alkyne reactions - Merdanym i Act antalyzod Hrdian ca Come Lazarmistry...
How to solve alkene and alkyne reactions
- Merdanym i Act antalyzod Hrdian ca Come Lazarmistry I V WORKSHOP #9 Alkenes, Alkynes, Reactions 1. Give a reasonable mechanism for the following reaction. Clearly show intermediates and show the movement of electron pairs with curved arrows. all сна H20. (H2SO4) H₃C CH₂ нас он H3CX сна 2. The addition of HBr to 2-methylpropene can, in principle, give either 1-bromo-2- methylpropane or 2-bromo-2-methylpropane. In reality, only the latter is formed. Show mechanisms...
SHORT ANSWER: 1.) Explain “Hard versus Soft” acid-base behavior. 2.) Explain, in terms of ΔS & ΔG, why imperfections occur in crystals & be able to describe at least two of the four main types...
SHORT ANSWER: 1.) Explain “Hard versus Soft” acid-base behavior. 2.) Explain, in terms of ΔS & ΔG, why imperfections occur in crystals & be able to describe at least two of the four main types of defects, with a drawing of each. 3.) Describe how electron transfer occurs in either the outer sphere or the inner sphere redox reaction mechanism (choose one OR the other). 4.) Explain how to synthesize the cis and trans isomer of a square planar complex,...
Bonding and Molecular Geometry Both the alkene C4Hs and the alkyne CaHe have rigid bond structures. However, С«Hs con form three isomers whereas С.H6 can form only two isomers, why is this so? 4. 5. Are these molecules isomers? Why or why not? 6. which of the following molecules are geometric isomers, and which are structural isomers? Which molecule is in the trans position and which is in the cis position? H,C-CH H CH-CH-CH-CH, H-CHCH CH, 7. The skeletal model...
ChemActivity 10: Oxidation and Radu 11. Draw the major organic product of each of the following reactions (always assume exces | Họcác TC–CH, - Model 5: Reduction of Alkynes H, and Pt or Pd metal will reduce both it bonds of a triple bond; however, careful use of a weaker catalyst (e.g. Lindlar catalyst) will reduce only one bond, giving either a cis or trans alkene. Synthetic Transformations 10.3-10.5: Stereoselective Alkyne Reductions H/Pt or Pd metal 107 R-cac-R HH H2/Ni,B...
4.(18 points) Using the arrow, provide the detailed reaction conditions necessary to give the following. You do not need to provide any starting material or product, just the reaction conditions (see example below) 1.B Example: Show reagent 'B' followed by aqueous acid: 2. H30 a. Markovnikov addition of H2O to a double bond: b. Anti-Markovnikov addition of H2O to a double bond: c. Markovnikov addition to form an alkyl bromide from an alkene: d. Reaction conditions to change 1,2-dimethylcyclohexene into...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products that can form on EACH face of the alkene. Here, we use trifluoro-per-acetic acid and (Z)-but-2-ene. [The important oxygen atom is filled in...] CF 2B) (CIRCLE ONE or more...) The above pair of epoxide possibilities are: enantiomers / diastereomers / conformers / identical / meso / entgegen / zusammen 2C) (CIRCLE ONE) How many stereochemical products can be formed in this specific particular reaction?...
Page - 2 - of 9 2A) Draw the concerted mechanism and the oxirane (epoxide) products that can form on EACH face of the alkene. Here, we use trifluoro-per-acetic acid and (Z)-but-2-ene. [The important oxygen atom is filled in...) ÇF3 2B) (CIRCLE ONE or more...) The above pair of epoxide possibilities are: enantiomers / diastereomers / conformers / identical / meso / entgegen zusammen 2C) (CIRCLE ONE) How many stereochemical products can be formed in this specific, particular reaction? (That...
How to solve alkene and alkyne reactions
- Merdanym i Act antalyzod Hrdian ca Come Lazarmistry I V WORKSHOP #9 Alkenes, Alkynes, Reactions 1. Give a reasonable mechanism for the following reaction. Clearly show intermediates and show the movement of electron pairs with curved arrows. all сна H20. (H2SO4) H₃C CH₂ нас он H3CX сна 2. The addition of HBr to 2-methylpropene can, in principle, give either 1-bromo-2- methylpropane or 2-bromo-2-methylpropane. In reality, only the latter is formed. Show mechanisms...
Most questions answered within 3 hours.
-
You are going to sell fruits & vegetables at a local
roadside market. List separately and...
asked 2 minutes ago -
Hows does water affect the digestion of fats ?
asked 2 hours ago -
A buffer that contains 0.41 M of a base, B and 0.21 M of its
conjugate...
asked 2 hours ago -
Pleaaaaaaaasssssse help me please please it's more important
:((((((((((((((((((((
CASE STUDY
Nissan Company
Nissan Motor Company,...
asked 2 hours ago -
Calculate the concentration of hydronium and hyroxide ions in 1)
2.0 mol/L HNO3 2) 0.5 mol/L...
asked 2 hours ago -
In a loop-the-loop ride a car goes around a vertical, circular
loop at a constant speed....
asked 2 hours ago -
50 grams each of water (18.015 g/mol) and ethylene glycol
(C2H6O2) (62.07 g/mol) are mixed. At...
asked 2 hours ago -
The life expectancy of sport utility vehicles follows a normal
distribution with a mean of 145.8...
asked 3 hours ago -
If an object with mass of 5 kg is pushed with a force of 552 N,...
asked 2 hours ago -
Suppose your program already has a list called nums, which
contains several numbers. Write a for...
asked 3 hours ago -
A spherical shell with a finite thickness just barely floats in
water. If the shell is...
asked 3 hours ago -
Explain in detail whether the following is true or false:
Total factor productivity will rise only...
asked 3 hours ago