Find spin only magnetic moment of [Fe(H2O)5NO](2+)

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Discussion Overview

The discussion revolves around calculating the spin-only magnetic moment of the complex ##[Fe(H2O)5NO]^{2+}##, focusing on the oxidation states of iron and nitric oxide, and the resulting electron configuration.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant states that the magnetic moment is calculated to be 3.87, assuming iron is in the +1 oxidation state with a configuration of $$[Ar]3d^64s^1$$ and five unpaired electrons.
  • Another participant corrects the oxidation state of iron to +3, suggesting that the electron configuration should be 3d7, which implies a different number of unpaired electrons.
  • A third participant agrees that if iron is +3, there would still be five unpaired electrons, leading to a contradiction regarding the magnetic moment being 3.87.
  • A fourth participant mentions conflicting information from their textbook, which states iron as + and nitric oxide as +, but acknowledges that this data may be outdated and expresses uncertainty about which information to trust.

Areas of Agreement / Disagreement

Participants express disagreement regarding the correct oxidation states of iron and nitric oxide, leading to uncertainty about the number of unpaired electrons and the corresponding magnetic moment. No consensus is reached on the correct values or configurations.

Contextual Notes

There are limitations regarding the assumptions made about oxidation states and electron configurations, which are not fully resolved in the discussion.

Titan97
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Homework Statement


Find spin only magnetic moment of ##[Fe(H2O)5NO]^{2+}##

Homework Equations


None

The Attempt at a Solution


When I used Google, the magnetic moment in 3.87
##Fe## is in +1 oxidation state. So configuration is $$[Ar]3d^64s^1$$
There are 5 unpaired electrons. How does magnetic moment become 3.87?
 
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the configuration readjusts to 3d7. And there are more problems: Fe is said to be in +3 and NO is in -1. Look it up in Google.
 
If that's the case, then there are 5 unpaired electrons. Magnetic moment won't be 3.87
 
Yeah, I know. And it is a problem for me too, for my textbook says that it is Fe+ and NO+. But apparently that is 15 year old data. I'm not sure which one to follow, and as of now, I have no time to follow my research on the net up. I will look it up again and get back.
 
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