1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina1246 [14]
3 years ago
7

When methyloxirane is treated with HBr, the bromide ion attacks the less substituted position. However, when phenyloxirane is tr

eated with HBr, the bromide ion attacks the more substituted position. Explain the difference in regiochemistry in terms of a competition between steric effects and electronic effects. (Hint: It may help to draw out the structure of the phenyl group.)

Chemistry
1 answer:
konstantin123 [22]3 years ago
4 0

Answer:

See explanation and picture below

Explanation:

First, in the case of methyloxirane (Also known as propilene oxide) the mechanism that is taking place there is something similar to a Sn2 mechanism. Although a Sn2 mechanism is a bimolecular substitution taking place in only step, the mechanism followed here is pretty similar after the first step.

In both cases, the H atom of the HBr goes to the oxygen in the molecule. You'll have a OH⁺ in both. However, in the case of methyloxirane the next step is a Sn2 mechanism step, the bromide ion will go to the less substitued carbon, because the methyl group is exerting a steric hindrance. Not a big one but it has a little effect there, that's why the bromide will rather go to the carbon with more hydrogens. and the final product is formed.

In the case of phenyloxirane, once the OH⁺ is formed, the next step is a Sn1 mechanism. In this case, the bond C - OH⁺ is opened on the side of the phenyl to stabilize the OH. This is because that carbon is more stable than the carbon with no phenyl. (A 3° carbon is more stable than a 2° carbon). Therefore, when this bond opens, the bromide will go there in the next step, and the final product is formed. See picture below for mechanism and products.

You might be interested in
When a sample is heated water is observed at the top of the tube. The compound melts and changes color. Te residue is not entire
harkovskaia [24]

Answer:

hydrate

Explanation:

when a hydrate is heated,it changes color due to the exothermic reaction taking place.the structure of the complex changes but not entirely.this result in the sample to to not dissolve completely and we can observe the small traces of the sample.

7 0
3 years ago
Which law was used to determine the relationship between the volume and the number of moles?​
lawyer [7]

Answer:

The Mole-Volume Relationship: Avogadro's Law. A plot of the effect of temperature on the volume of a gas at constant pressure shows that the volume of a gas is directly proportional to the number of moles of that gas. This is stated as Avogadro's law.

Explanation:

4 0
3 years ago
Explain how nuclear and chemical reactions differ in terms of how they are balanced. (PLEASE ANSWER ASAP THIS NEEDS TO BE TURNED
Tcecarenko [31]

Explanation:

(1) Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei. ... (3) Rates of chemical reactions are influenced by temperature and catalysts.

6 0
3 years ago
An atom of aluminum in the ground state and an atom of gallium in the ground state have the same
Kobotan [32]
(4) total number of valence electrons, because they exist in the same group.
3 0
3 years ago
How does a sex cell differ from a body cell
Delvig [45]

Sex cells have one set of chromosomes; body cells have two.

I hope this helps you.

5 0
2 years ago
Other questions:
  • What are seeds made out of?
    12·1 answer
  • Is silver malleable because the valence electrons are strongly attracted to the nucleus
    12·1 answer
  • What is the length of one mole of the typical cell phone that is approximately 15 cm in length?
    14·2 answers
  • HELP!
    9·1 answer
  • What is the ending for the names of all binary compounds, both ionic and molecular?
    14·2 answers
  • Define a physical change and give one example
    11·1 answer
  • What might be a long term benefit for the nation from space exploration. A. Taxes will be slower. B. More people will be interes
    5·1 answer
  • 86.64 g LiBr mol LiBr
    8·2 answers
  • Please anyone help me
    15·2 answers
  • Which of the following compounds contains an ionic bond? *will give brainliest plus 15 points*
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!