Pi Strength

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Hannah Faris 1C
Posts: 34
Joined: Fri Sep 28, 2018 12:18 am

Pi Strength

Postby Hannah Faris 1C » Mon Nov 26, 2018 2:28 pm

Hi, Prof. Lavelle stressed the fact that Pi bonds prevent rotation from happening, and if the atoms rotate the bond breaks. Does this mean that a pi bond would normally break before a sigma bond if energy is applied to a molecule?

Thanks!

405161024
Posts: 36
Joined: Fri Sep 28, 2018 12:25 am

Re: Pi Strength

Postby 405161024 » Mon Nov 26, 2018 2:34 pm

I'm not certain but I would think that the sigma bond would break first given that the bond is weaker

Hannah Faris 1C
Posts: 34
Joined: Fri Sep 28, 2018 12:18 am

Re: Pi Strength

Postby Hannah Faris 1C » Mon Nov 26, 2018 2:48 pm

wait friend I think a sigma bond is stronger not weaker bc they overlap more directly. But going by that logic that does answer my question bc then the pi bond would break first (since it's weaker). I didn't even consider the relative strengths so thank you for bringing it up!

Aria Soeprono 2F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Re: Pi Strength

Postby Aria Soeprono 2F » Mon Nov 26, 2018 3:08 pm

A double bond is stronger than a single bond because of the presence of both a sigma and pi bond, but it is less than twice as strong as a single bond. Although I am unsure, using this line of reasoning it would make sense that a pi bond is weaker than a sigma bond. It makes a bond stronger in a double or triple bond, but not by twice or three times that of a sigma bond.

Yiting_Gong_4L
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Re: Pi Strength

Postby Yiting_Gong_4L » Mon Nov 26, 2018 5:14 pm

a sigma bond is stronger than a pi bond, therefore double bonds are stronger than single bonds.


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