strength of sigma and pi bonds


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Alysia Garcia 1B
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Joined: Wed Feb 21, 2018 3:02 am

strength of sigma and pi bonds

Postby Alysia Garcia 1B » Sun Jun 03, 2018 4:49 pm

Would a sigma bond be stronger than a pi bond and why?

Shione Nakahara 1F
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Joined: Fri Apr 06, 2018 11:04 am

Re: strength of sigma and pi bonds

Postby Shione Nakahara 1F » Sun Jun 03, 2018 4:59 pm

Yes, a sigma bond is stronger than a pi bond. This is because the length of a sigma bond is shorter than a pi bond, and it takes more energy to break a sigma bond.

AshleyLamba1H
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Joined: Fri Apr 06, 2018 11:03 am

Re: strength of sigma and pi bonds

Postby AshleyLamba1H » Sun Jun 03, 2018 6:54 pm

Pi bonds have a sideways overlap while sigma bonds have an axial overlap. Axial overlaps have a higher amount of overlapping than sideways overlaps do.

Chiara Berruto 1K
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Re: strength of sigma and pi bonds

Postby Chiara Berruto 1K » Mon Jun 04, 2018 7:08 pm

sigma bonds are able to rotate on their axis and are a stronger where as pi bonds would break if they were rotated

Cameron Smith 1I
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Re: strength of sigma and pi bonds

Postby Cameron Smith 1I » Mon Jun 04, 2018 10:58 pm

What occurs when pi bonds are broken?

Raquel Floyd 1K
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Joined: Wed Sep 21, 2016 2:59 pm

Re: strength of sigma and pi bonds

Postby Raquel Floyd 1K » Tue Jun 05, 2018 2:23 pm

Whenever a bond breaks that is then classified as a chemical reaction. So if a pi bond breaks, the molecule has then undergone a chemical reaction.

Cindy Nguyen 1L
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Re: strength of sigma and pi bonds

Postby Cindy Nguyen 1L » Tue Jun 05, 2018 3:23 pm

Shione Nakahara 1F wrote:Yes, a sigma bond is stronger than a pi bond. This is because the length of a sigma bond is shorter than a pi bond, and it takes more energy to break a sigma bond.

Because a double bond is a sigma bond and a pi bond and every type of chemical bond has to have at least one sigma bond, how are double bonds shorter than single bonds then?

Sonia Aronson 1B
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Re: strength of sigma and pi bonds

Postby Sonia Aronson 1B » Tue Jun 05, 2018 10:45 pm

I think a double bond is stronger than a single bond because the two p orbitals overlap and pull the atoms closer together.

Joanna Pham - 2D
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Re: strength of sigma and pi bonds

Postby Joanna Pham - 2D » Wed Jun 06, 2018 12:28 pm

Shione Nakahara 1F wrote:Yes, a sigma bond is stronger than a pi bond. This is because the length of a sigma bond is shorter than a pi bond, and it takes more energy to break a sigma bond.


Wait but aren't sigma bonds single bonds? Wouldn't sigma bonds be weaker since single bonds are weaker than double bonds (which is what the pi bonds are)?

chemlover
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Re: strength of sigma and pi bonds

Postby chemlover » Sat Jun 09, 2018 1:38 pm

Why do Pi bonds break when they rotate?

Amanda 1A
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Re: strength of sigma and pi bonds

Postby Amanda 1A » Sun Jun 10, 2018 5:35 pm

since pi bonds are caused by side-to-side overlapping where there is much less overlap due to the orbital paths being parallel, they are easier to break than sigma bonds that overlap head-to-head.


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