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Bond angle/s character

Posted: Mon Nov 25, 2019 4:06 pm
by halle young 4A
can some please explain homework problem 2F.15?

noting that the bond angle of am sp3 hybridized atom is 109.5 and that of an sp2 hybridized atom is 120, do you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids increases?

specifically what do they mean by s-character?

Re: Bond angle/s character

Posted: Mon Nov 25, 2019 4:18 pm
by Cooper Baddley 1F
I understood this question as from sp3 to sp2 the bond angles increase from 109.5 to 120 so if it goes from sp2 to sp you would expect bond angles of 180 as it would be in a linear arrangement

Re: Bond angle/s character

Posted: Mon Nov 25, 2019 4:45 pm
by Sam McNeill 1E
S-character I believe is the ratio of s to p, so as the ratio grows for s, the angles grow. Just think less p, less regions of density to repel the other regions.

Re: Bond angle/s character

Posted: Wed Nov 27, 2019 2:32 am
by Shrayes Raman
Sp3 has less s character than sp2 so so will have more than sp2... This means the bond angle will increase as a trend