Bond Lengths

Moderators: Chem_Mod, Chem_Admin

AlyssaBei_1F
Posts: 99
Joined: Fri Sep 28, 2018 12:17 am

Bond Lengths

Postby AlyssaBei_1F » Tue Nov 06, 2018 12:45 am

Can someone explain to me the process for determining bond lengths?

jonathanjchang2E
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: Bond Lengths

Postby jonathanjchang2E » Tue Nov 06, 2018 12:55 am

Bond lengths are usually given on questions and if they are asking to find the bond length of lewis structures, you have to take into consideration resonance structures.

rosemarywang4i
Posts: 34
Joined: Fri Sep 28, 2018 12:28 am

Re: Bond Lengths

Postby rosemarywang4i » Tue Nov 06, 2018 3:28 pm

^ that and also, if a question asks you to determine actual bond length from several givens it's just the average.

705192887
Posts: 77
Joined: Fri Sep 28, 2018 12:18 am

Re: Bond Lengths

Postby 705192887 » Tue Nov 06, 2018 4:20 pm

Bond length decreases as the number of bonds increases since the two atoms are more strongly attracted to one another. For example, triple bonds are shorter than double bonds which are shorter than single bonds. When determining bond length, take the average of all the bond lengths in the resonance structures. It seems like it'd be more difficult, but it's actually quite simple since the bond lengths of a resonance structure are actually just a blend of all the bond lengths.

Lorena Zhang 4E
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Re: Bond Lengths

Postby Lorena Zhang 4E » Tue Nov 06, 2018 5:21 pm

When the molecule has resonance structures, you need to find the average bond length. For example, if the molecule has a single bond in one form of resonance and a double bond in the other, you need to calculate the average of the two.

Madeera_Mian_3B
Posts: 30
Joined: Fri Sep 28, 2018 12:24 am

Re: Bond Lengths

Postby Madeera_Mian_3B » Wed Nov 07, 2018 8:31 pm

To expand on what others have said, another way to determine bond lengths is if it is a larger atom there is a larger distance causing it to have a weak bond but longer bond length.

taiyeojeikere-3C
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: Bond Lengths

Postby taiyeojeikere-3C » Sat Nov 10, 2018 3:34 pm

When drawing Lewis Structures, would the structure be marked incorrect if you don't draw the bonds to have the correct angles like 120 degrees, etc.?


Return to “Bond Lengths & Energies”

Who is online

Users browsing this forum: No registered users and 1 guest