Spectrochem

Discussion in 'Odds & Ends' started by TepidFish, Dec 7, 2009.

  1. TepidFish

    TepidFish New User

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    Can anyone help I have some questions regarding drawing d orbitals
     
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  2. edberg505

    edberg505 Legend

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    What's your question?
     
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  3. TepidFish

    TepidFish New User

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    For [Co(en)2(OH)2]NO3 Draw the d-orbital splitting pattern for both the high spin and low spin complex ions. How many unpaired electrons are found in each?
     
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  4. edberg505

    edberg505 Legend

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    Hmm, I'm not sure if I'm reading your formula correctly or not. So that's cobalt with 2 ethylenediamines, 2 hydroxides?, and a nitrate? If that's right then that makes it cobalt 3. But then that means it should be octahedral which means you have too many ligands. Let me know if this formula is right.
     
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  5. TepidFish

    TepidFish New User

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    Too many ligands? en binds in 2 twice like this, except with Co in the center and 2OH's attaching instead of Cl's, binding at 6 sites giving it a coordination number of 6 = octahedral.
    [​IMG]

    This is what I ended up turning in

    1. [Ar]3d6, Diethyleneammine bishydroxl cobalt II nitrate, octahedral shape, 3+ charge on cobalt, hi-spin is paramagnetic with four unpaired electrons, low spin is diamagnetic with zero unpaired electrons

    Thanks for checking out my post and trying to help, I was spinning in my chair for a good hour before figuring out
     
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  6. edberg505

    edberg505 Legend

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    So, I must have looked at the formula wrong. The nitrate must be the counter ion making it cobalt 3+. So it is indeed octahedral meaning the xy, xz, yz are all degenerate. So yes your counting of unpaired spins for high spin and low spin is correct. I just wanted to make sure that the cobalt was in an octahedral geometry. By the way, what class is this for? Inorganic chem? This is almost like a grad level type question.
     
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  7. GRANITECHIEF

    GRANITECHIEF Hall of Fame

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    What happened edberg, get board at the tables? We're you able to set up any tennis? I know RobC went to Atlanta.
     
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  8. edberg505

    edberg505 Legend

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    Hahaha, good one granitechief. I actually just came back from hitting with Rob. He's a pretty strong player. It's damn cold out here though so we didn't hit too much. About to head back to the tables soon though.
     
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  9. TepidFish

    TepidFish New User

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    Gen chem II, and its flippin' freezing :( tennis is very hard to play
     
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  10. edberg505

    edberg505 Legend

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    Wow, chem II? That's crazy. I didn't learn this stuff until I took inorganic. But I must say it is completely and utterly useless.
     
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  11. TepidFish

    TepidFish New User

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    lol, have you finished ochem? I was wondering how it compared to gchem
     
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  12. edberg505

    edberg505 Legend

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    Yeah, I have my PhD in chemistry. Ochem is kind of a pain. People try to say that it isn't completely memorization, but it totally is. The 1st part of Ochem isn't that bad. The 2nd part is a headache. PChem is probably the worst out of all of them though.
     
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  13. Court_Jester

    Court_Jester Hall of Fame

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    I totally agree.

    LOL! This is the part of chemistry that I can relate to. Of course, I'm a physicist so I tend to gravitate towards those topics like wave equations, wave functions, spherical harmonics, etc. :)
     
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  14. edberg505

    edberg505 Legend

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    Yeah, it was a bit tough for me at first. I remember the very first day of Pchem the prof walks in and starts talking about Schrodinger's cat and a particle in a box and I'm like wtf? I am in a chemistry class right? LOL. But I was okay with that stuff after a while. The thing that really kicked my *** was statistical mechanics. Man I hate that crap. But at least with PChem you can rationalize your way to an answer. With OChem, if you don't know what reagent is responsible for bringing about a desired product, well then you are screwed!
     
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  15. Court_Jester

    Court_Jester Hall of Fame

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    For what's it's worth, even the simplest case (particle in a box) in solving Schroedinger's equation didn't make sense to me at all when I first took the class.

    Man, I hated statistical mechanics too, above all else! I got a slightly better appreciation of the statmech now but I never warmed up to it when I was a student.

    Strangely enough, physics majors were only required to take one general chem class when I was an undergrad. :confused: Personally, I would have preferred to have required more chemistry than that. I just started reading up on some very basic ochem and it's fascinating but I'm not a fan of memorizing things. :???:
     
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  16. TepidFish

    TepidFish New User

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    holy a PhD in chem... haha yeah i've heard horror stories about pchem with thermo
     
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