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Topic: predicted shape and bond angle... I'm struggling  (Read 6233 times)

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Offline mossdg

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predicted shape and bond angle... I'm struggling
« on: March 14, 2011, 12:09:59 PM »
What is the predicted shape and bond angle for the carbocation species: CH3+ (Methyl)
  :-[
« Last Edit: March 14, 2011, 12:48:55 PM by mossdg »
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Offline tamim83

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Re: predicted shape and bond angle... I'm struggling
« Reply #1 on: March 14, 2011, 01:27:03 PM »
Can you draw a Lewis structure for the methyl cation? The carbon won't have an octet but the Lewis structure will help with VSEPR predictions. 
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Offline mossdg

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Re: predicted shape and bond angle... I'm struggling
« Reply #2 on: March 14, 2011, 01:49:04 PM »
I did a Lewis diagram, but how will the positive charge on C affect the bond angles of the H's?
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Offline sjb

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Re: predicted shape and bond angle... I'm struggling
« Reply #3 on: March 14, 2011, 02:50:58 PM »
What is the predicted shape for the ammonium cation? For methane? Does the charge have any effect?
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Offline tamim83

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Re: predicted shape and bond angle... I'm struggling
« Reply #4 on: March 14, 2011, 04:08:16 PM »
Also, what's the difference (other than the charge) between CH3+ and CH4, in terms of bonds?
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Offline jcjlf

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Re: predicted shape and bond angle... I'm struggling
« Reply #5 on: March 15, 2011, 04:09:01 PM »
What about three C-H bonds instead of four?  :o
Using VSEPR it's now easy to predict the shape: the three C-H pairs go as far apart as they can and than you get a regular triangle. No unpaired electrons because one is missing, it's an ion.
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