Single vs. Double bonds

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VLi_2B
Posts: 99
Joined: Sat Sep 14, 2019 12:15 am

Single vs. Double bonds

Postby VLi_2B » Sun Oct 27, 2019 1:00 am

Why are single bonds longer than double bonds?

Alex Tchekanov Dis 2k
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Joined: Sat Aug 24, 2019 12:16 am

Re: Single vs. Double bonds

Postby Alex Tchekanov Dis 2k » Sun Oct 27, 2019 1:04 am

When there is a double bond, there are more electrons being shared between the two atoms, thus the attraction between the nucleus of the atoms (the positively charged regions) are pulling on two negatively charged electrons instead of one. This is a stronger attraction than a single bond with one electron being attractive to the nucleus. That is also why a triple bond is shorter than a double bond.

Matthew Tsai 2H
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Re: Single vs. Double bonds

Postby Matthew Tsai 2H » Sun Oct 27, 2019 6:13 pm

Because there are more electrons being shared between the atoms, there is a greater attractive force that pulls the atoms closer together, shortening bond length.

Qilan Li 4I
Posts: 54
Joined: Mon Jun 17, 2019 7:23 am

Re: Single vs. Double bonds

Postby Qilan Li 4I » Sun Oct 27, 2019 6:34 pm

In double bonds, there are four bonding electrons between two atoms instead of two in single bonds so there is more attraction between the atoms when there is a double bond. Stronger Attraction = Shorter Bond

Jessica Tejero 3L
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Joined: Wed Sep 25, 2019 12:16 am

Re: Single vs. Double bonds

Postby Jessica Tejero 3L » Sun Oct 27, 2019 6:37 pm

Double bonds involving carbon are stronger than single bonds and are also shorter. Double and triple covalent bonds are stronger than single covalent bonds.

Donavin Collins 1F
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Re: Single vs. Double bonds

Postby Donavin Collins 1F » Sun Oct 27, 2019 7:50 pm

Since the double bond creates a stronger bond, the attraction pulls the atoms closer together which shortens the length of the bond.

Sydney Pell 2E
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Joined: Wed Sep 11, 2019 12:17 am

Re: Single vs. Double bonds

Postby Sydney Pell 2E » Sun Oct 27, 2019 9:24 pm

Sometimes, if the structure has resonance, the double bond may not be much longer than the single bond. This occurs only if a species is resonant because all of its possible resonant structures blend, thus creating a partial double bond structure and making the double bond shorter than it otherwise would have been, but still longer than the normal single bond.

Samuel Tzeng 1B
Posts: 103
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Re: Single vs. Double bonds

Postby Samuel Tzeng 1B » Sun Oct 27, 2019 9:31 pm

Since double bonds are stronger, they pull the atoms closer together and are therefore shorter.

Veronica Lu 2H
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Re: Single vs. Double bonds

Postby Veronica Lu 2H » Sun Oct 27, 2019 9:36 pm

The double bonds are much stronger than single bonds, therefore the pull is stronger making them shorter

Aadil Rehan 1D
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Re: Single vs. Double bonds

Postby Aadil Rehan 1D » Sun Oct 27, 2019 11:58 pm

Fun fact: the shorter double bonds means that the stereochemistry (shape chemistry) is also greatly simplified.

zachary_nhem_4I
Posts: 57
Joined: Sat Aug 17, 2019 12:18 am

Re: Single vs. Double bonds

Postby zachary_nhem_4I » Mon Oct 28, 2019 12:12 am

More electrons leads to shorter bonds while less electrons means less of an attraction

RichBollini4G
Posts: 100
Joined: Wed Sep 18, 2019 12:18 am

Re: Single vs. Double bonds

Postby RichBollini4G » Mon Oct 28, 2019 1:57 pm

VLi_1L wrote:Why are single bonds longer than double bonds?

The attraction is stronger in the double bond, since there are more electrons, which pulls the atoms closer together, causing the bond length to be shorter than a single bond.

Kelsey Ash 1D
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Joined: Wed Sep 18, 2019 12:16 am

Re: Single vs. Double bonds

Postby Kelsey Ash 1D » Mon Oct 28, 2019 2:28 pm

Double bonds are stronger and pull the atoms closer together which makes them shorter

nicole-2B
Posts: 103
Joined: Fri Aug 30, 2019 12:18 am

Re: Single vs. Double bonds

Postby nicole-2B » Fri Nov 08, 2019 2:44 pm

There are more electrons being shared so there is a greater attraction causing for shorter bonds.

ranqiao1e
Posts: 51
Joined: Sat Sep 14, 2019 12:15 am

Re: Single vs. Double bonds

Postby ranqiao1e » Fri Nov 08, 2019 10:00 pm

Because the strength of the single bond is much weaker than double bonds, so the electrons are held less closely together.

305416361
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

Re: Single vs. Double bonds

Postby 305416361 » Sun Nov 10, 2019 12:03 am

Single bonds are a lot weaker than double bonds because there are less electrons involved in the bonding process. Since they are weaker, they aren't pulled as closely together, whereas double bonds are stronger and pulled closer to each other, and triple bonds even stronger and closer than that


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