Why is the Size of Superoxide Larger than Peroxide?

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In summary, the size of superoxide (O2-) is larger than peroxide (O22-) due to the weaker bond produced by superoxide and the fact that it only reacts with one cation (KO2) compared to two cations (e.g. H2O2) in peroxide. The oxidation state of superoxide is -1/2 and peroxide is -1, with K and H being +1 cations.
  • #1
real
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why the size of superoxide is lager than preoxide??
 
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  • #2
See this for a brief discussion - http://en.wikipedia.org/wiki/Superoxide - but basically the superoxide radical O2- would produce a weaker bond than O22-. On the other hand superoxide only reacts/bonds with one cation (KO2), as opposed to two cations in the case of peroxide (e.g. H2O2).
 
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  • #3
thanks a lots
 
  • #4
what is the meaning of this statement??
"On the other hand superoxide only reacts/bonds with one cation (KO2), as opposed to two cations in the case of peroxide (e.g. H2O2)."
 
  • #5
The number of atoms would also determine the 'size' of a molecule, in addition to the bond 'lengths'. I was thinking of the original question - "why the size of superoxide is larger than peroxide".
 
  • #6
real said:
what is the meaning of this statement??
"On the other hand superoxide only reacts/bonds with one cation (KO2), as opposed to two cations in the case of peroxide (e.g. H2O2)."

oxidation state of superoxide is -1/2, peroxide is -1. K and H are both +1 cations.
 
  • #7
i see. I get your point, thanks~!
 

1. What are superoxide and peroxide?

Superoxide and peroxide are types of reactive oxygen species (ROS) that are produced naturally in the body as byproducts of normal cell metabolism. They are also present in the environment and can be formed by pollution, radiation, and chemical reactions.

2. What are the effects of superoxide and peroxide on the body?

Superoxide and peroxide are highly reactive molecules that can cause damage to cells and tissues if not properly balanced by antioxidants. They can lead to oxidative stress, inflammation, and contribute to the development of diseases such as cancer, cardiovascular diseases, and neurodegenerative disorders.

3. How are superoxide and peroxide regulated in the body?

The body has a complex system of enzymes and antioxidants that help regulate the levels of superoxide and peroxide. These include superoxide dismutase, catalase, and glutathione peroxidase, which convert superoxide and peroxide into less harmful substances.

4. Can superoxide and peroxide be beneficial to the body?

In small amounts, superoxide and peroxide can play important roles in cell signaling and immune defense. However, excessive levels can have damaging effects on the body. Maintaining a balance is crucial for overall health.

5. How can we reduce the levels of superoxide and peroxide in the body?

Adopting a healthy lifestyle, including a balanced diet and regular exercise, can help reduce the production of superoxide and peroxide in the body. Consuming foods rich in antioxidants, such as fruits and vegetables, can also help neutralize these molecules. Additionally, avoiding exposure to environmental pollutants and toxins can help reduce the levels of superoxide and peroxide in the body.

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