Explain what is the optical purity or enantiomeric excess

Assignment Help Chemistry
Reference no: EM13310750

when optically active (R)-2-bromoctane ([alpha] = +39.6 degrees) was allowed to react with a mixture of water and ethanol, 2-octanol with [alpha] obs of + 1.0 degrees was obtained as the major product. From the chemical literature it is known that optically pure (R)-2-octanol has a specific rotation of -10.0 degrees. What is the optical purity, or enantiomeric excess, of the 2-octanol produced in this reaction? 10% S. What is the ratio of enantiomers of 2-octanol in the product mixture? 55% (S) and 45% (R). However, I am not sure how to draw the structure of the major enantiomer produced in this reaction. Indicate the configuration of the stereogenic center using wedged and hashed lines.

Reference no: EM13310750

Questions Cloud

Check the shear resistance of the beam use asd design method : The beam is loaded with a concentrated live load of 10 kips at the center of its span, in addition to its own weight.. The dead load includes the beam weight. The steel is A242, Grade 50.
Explain the resulting sign of delta g and the spontaneity : Construct a delta H and delta S table, including the four possibilities associated with the two possible signs for each of delta H and delta S. Discuss the resulting sign of delta G and the spontaneity of the process.
Explain how to design for bending only using lrfd : A simply supported steel beam over a 24-ft span carries a uniformly distributed dead load of 2 k/ft, including an allowance for the self-weight, and a live load of 3.5 k/ft. The steel is A992, Grade 50.
How long does it take to reach the maximum height : A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 18.9 m/s directly upward. How long does it take to reach the maximum height
Explain what is the optical purity or enantiomeric excess : What is the optical purity, or enantiomeric excess, of the 2-octanol produced in this reaction? 10% S. What is the ratio of enantiomers of 2-octanol in the product mixture
What is the minimum angle to shoot an arrow : A draw bridge of length L is being held up by an axel at its pivot and by a chail that is also of length L. The drawbridge has uniform mass. What is the minimum angle to shoot an arrow
Which one gets to the bottom first and why : A solid sphere and a shell sphere roll down an incline. Which one gets to the bottom first and why
Determine the actual cbod and nbod of wastewater : During a BOD test, 2 mL of waste water having a DO of 0 was mixed with 298 mL of dilution water having a DO of 8.9 mg/L. After 5 days and 20 days, it was noted that the DO of the test bottle was 4.0 and 2.5 respectively
What flow rate do you need to reduce the risk by 95 percent : A new sponge iron factory has an annual capacity of 100,000 tons/year of Iron production. Benzopyrene is produced during this process at a rate of 0.00006% of Iron produced.

Reviews

Write a Review

Chemistry Questions & Answers

  Explain a nonmetal oxide dissolves in water to give an acid

A nonmetal oxide dissolves in water to give an acid. Show this for gaseous carbon dioxide by writing a balanced chemical equation. (b) A metal oxide dissolves in water to give a base. Show this for solid potassium oxide by writing a balanced chemi..

  Explain the ph at the equivalence point of the titration

What is the pH at the equivalence point of the titration and at the half equivalence point

  How much chlorine can be produced

Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine).

  Define the rate constant for the reaction

The rate constant for the reaction 2A ? 2B + C is 1.72 M -1min-1. Find the time, in seconds, needed to decrease the concentration of A from2.45 M to 1.22 M.

  What is the activation energy

Given that the rate constant is 4.0×10-4 at 25.0 degrees C and that the rate constant is 2.6×10-3 at 42.4 degrees C, what is the activation energy in kilojoules per mole?

  Determine what is the observed rate for the reaction

Determine what is the observed rate for the given reaction - empirically determined rate

  State maximum concentration level

Explain, in detail, how you would prepare this solution so a labmate could prepare it from your instructions

  Explain plane polarized light is rotated clockwise

Which of the following statements is true regarding chiral carbons with R configuration? a. plane polarized light is rotated clockwise b. plane polarized light is rotated counterclockwise

  Compute the concentration of an aqueous solution

Trees in cold climates may be subjected to temperatures as low as -60 C. Estimate the concentration of an aqueous solution in the body of the tree that would remain

  What is the empirical formula of vanillin

Vanillin, the dominant flavoring in vanilla, contains C, H, and O. When 1.05 g of this substance is completely combusted, 2.43 g of CO2 and 0.50 g of H20 are produced. What is the empirical formula of vanillin?

  What is the molar mass of the unknown gas

A sample of an unknown gas effuses in 11.7 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.23 min. What is the molar mass of the unknown gas?

  What mass (in grams) of steam must be mixed

What mass (in grams) of steam at 100°C must be mixed with 375 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 66.0°

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd