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Topic: Using VSEPR to predict Net Dipole Moments/ Bond Angles  (Read 9101 times)

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Offline Google555

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Using VSEPR to predict Net Dipole Moments/ Bond Angles
« on: November 03, 2007, 12:11:13 AM »
2-propanol
CH3CHOHCH3

propanal
CH3CH2CHO



propanone
CH3COCH3


propanoic acid
CH3CH2COOH



Sodium propanoate
NaCH3CH2C(O)O




I have to write VSEPR structures, bond angles and NEt dipole moments for all of those can someone help me out on doing some???
Especially the net dipoles.
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Offline Google555

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Re: Using VSEPR to predict Net Dipole Moments/ Bond Angles
« Reply #1 on: November 03, 2007, 03:24:02 AM »
Hi. I just wanted to add...I'm not trying to be lazy and get ppl online to do my homework ...I drew them as best I could ...I'm just having trouble predicting the net molecular dipoles on these...since there are so many C and H and O atoms ...

if someone could give me some insight into how to do this correctly each time

Thanks in advance :)
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Offline Yggdrasil

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Re: Using VSEPR to predict Net Dipole Moments/ Bond Angles
« Reply #2 on: November 03, 2007, 03:26:24 AM »
In most cases you can consider C-H bonds to have no dipole.  If anything, however, hydrocarbon chains have a very slight positive charge when there is anything electron withdrawing (e.g. an oxygen) nearby.  I hope this helps.
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