s-character and bond angle, question 2F15 7th edition


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Amy Lefley 1J
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Joined: Fri Sep 28, 2018 12:15 am

s-character and bond angle, question 2F15 7th edition

Postby Amy Lefley 1J » Mon Nov 26, 2018 7:42 pm

Question 2F15 in the 7th edition asks: do you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids is increased? The answer is: as the s-character of hybrid orbital increases, the bond angle increases. I do not know how to approach this question. I read in a previous chem community that the more s-character a bond has, the stronger and shorter the bond is. I also am struggling to understand this and would appreciate help!

juliasloan_4g
Posts: 67
Joined: Fri Sep 28, 2018 12:28 am

Re: s-character and bond angle, question 2F15 7th edition

Postby juliasloan_4g » Mon Nov 26, 2018 7:48 pm

This question also states that the bond angle for sp3 is 109.5 and bond angle for sp2 is 120. You can think of it as sp3 being 25 percent s characteristics and 75 percent p characteristics (1:3 ratio), and for sp2 this would be 33.3 percent s characteristic and 66.6 percent p characteristic (1:2 ratio). Once you see this you can see that when there is more of an s characteristic (33.3 compared to 25 percent), the bond angle increases.


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