Bond lengths

(Polar molecules, Non-polar molecules, etc.)

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Amy Perez 2K
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Bond lengths

Postby Amy Perez 2K » Fri Nov 06, 2015 7:18 am

How do we determine how long or short a bond is?

Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond lengths

Postby stelang » Fri Nov 06, 2015 9:07 am

We can determine bond lengths in a couple of ways. One way is looking at the Lewis structures of molecules. Another way is calculating the bond order. The point of utilizing these methods is to calculate exactly what type of bond is occurring between the atoms. We want to know if it is a single bond, double bond, triple bond , or something else. The greater number of bonds between two bonds the shorter it is. We did not learn how to calculate exact bond lengths as it is not necessary at this time but we should know how to compare bond lengths by using our knowledge of several patterns. Also remember that the greater the bond order the shorter the bond.

Lilly Lin 1L
Posts: 14
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond lengths

Postby Lilly Lin 1L » Fri Nov 06, 2015 12:02 pm

just remember that the higher the bond order, the shorter and stronger the bond, and vice versa: low bond order means a longer, weaker bond.

Vanessa A 3F
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

Re: Bond lengths

Postby Vanessa A 3F » Sun Nov 29, 2015 8:44 pm

there are two things to keep in mind
1. Triple bonds are the shortest, and single bonds are the longest. We determine how many bonds there are from the Lewis structure that we determine to be the best.
2. A molecular orbital theory chart may tell you that the bond between two atoms is 1.5, or 2.5, which simply indicates that those bonds would be slightly shorter than a single and double bond respectively.

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