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Hi! I was wondering if the length of double bonds is always 0.2 Å shorter than that of a single bond. For example, a C-C single bond has a length of 1.54 Å while a double bond is 1.34 Å. Similarly an N-O single bond has a length of 1.40 Å while a double bond is 1.20 Å. I'm not sure if this was just a coincidence, but just curious :)
As far as I know, there is no specific number that the bond lengths differ. It's just important to know that a single bond is longer than a double bond because a double bond has more electrons so the attractive force between the nucleus is stronger. Dr. Lavelle said he would give us the bond lengths if needed; I don't think you need to memorize any bond lengths. Just make sure you know the general trend.
I agree with the above post. I think the important thing to focus on is the trend of bond lengths and strength. Single bonds are longer, and double bonds are shorter. Longer bonds are weaker due to a lesser attractive force between the electrons, and shorter bonds are stronger due to a greater attractive force between the electrons.
Hi! I don't think it is always this way, I am pretty sure this is just a coincidence. However, what is always true is that a double bond is shorter than a single bond. Because the double bond is shorter, it is stronger and requires more energy to break the atoms apart.
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