Find Electron Affinities Higher than 1 for I, C & H

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SUMMARY

The discussion centers on the search for electron affinities greater than one for iodine (I), carbon (C), and hydrogen (H). It is established that such electron affinities do not exist for these atoms in the gas phase, as even oxygen, which can form a dianion (O2-), does so in a highly endothermic manner, making it unstable. The reference article provided offers insights into the rare existence of dianions, emphasizing the difficulty of binding two additional electrons.

PREREQUISITES
  • Understanding of electron affinity concepts
  • Familiarity with atomic structure and stability
  • Knowledge of gas phase chemistry
  • Basic comprehension of endothermic processes
NEXT STEPS
  • Read the article on dianions referenced in the discussion: Dianions in Gas Phase Chemistry
  • Study the stability of dianions and their formation processes
  • Explore the concept of endothermic reactions in detail
  • Investigate electron affinity values for other elements beyond I, C, and H
USEFUL FOR

Chemistry students, researchers in physical chemistry, and anyone interested in atomic behavior and electron interactions.

Gab
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Hello there

I am trying to find the electron affinities higher than one for the iodine, carbon and hydrogen atoms?
X n- where X is I , C and H and n>1
Is there any ideas?

Thank you in advance
 
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They don't exist! There is hardly any atom which manages to bind two additional electrons in the gas phase, not even oxygen.
 
DrDu said:
They don't exist! There is hardly any atom which manages to bind two additional electrons in the gas phase, not even oxygen.

my book says oxygen can, and states it to be +844 kilojoules per mol
 
xplosiv3s said:
my book says oxygen can, and states it to be +844 kilojoules per mol
This only means that formation of O2- is a highly endothermic process and that it is not stable.
 
OP, you might want to have a look at this article to get some more information on the (few) existing dianions:

http://dx.doi.org/10.1021/jp107177d

the article is actually quite mind-bending in its own right.
 

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