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Topic: [CHMA] Question about Bond Angles  (Read 2516 times)

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Offline GreenAssailant

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[CHMA] Question about Bond Angles
« on: December 10, 2011, 09:02:35 PM »
Hello,

When you consider bond angles in VSEPR theory, do we generally assume that to be the angle between the two bonding pairs?
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Offline UG

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Re: [CHMA] Question about Bond Angles
« Reply #1 on: December 11, 2011, 03:23:36 AM »
Yes, but remember that a bond angle is formed between three atoms. For something like PCl5, you may need to specify what three atoms you are talking about as some bond angles are 90o and others are 120o

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Offline GreenAssailant

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Re: [CHMA] Question about Bond Angles
« Reply #2 on: December 11, 2011, 10:07:22 AM »
Quote from: UG on December 11, 2011, 03:23:36 AM
Yes, but remember that a bond angle is formed between three atoms. For something like PCl5, you may need to specify what three atoms you are talking about as some bond angles are 90o and others are 120o



A bond angle is formed between three atoms? But are they not cases where you have a bent shape and a linear shape? Do not those count as bond angles?
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Offline UG

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Re: [CHMA] Question about Bond Angles
« Reply #3 on: December 11, 2011, 05:22:49 PM »
Bent shape, eg, H2O, is composed of three atoms and the 'bend' is formed by the H-O-H bond. Similarly, a linear shape, such as CO2 is also composed of three atoms, the O-C-O bond is 180o.
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