HW 2.59 Question


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Vana Mirzakhani 3I
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

HW 2.59 Question

Postby Vana Mirzakhani 3I » Mon Nov 26, 2018 7:13 pm

On the 2.59 homework, how do we write the composition of bonds and hybridization of lone pairs for H2C=CHCHO when you have a double bond with one pi and one sigma bond? I am having difficulty understanding, for example, how to reach one of the answers of sigma (C2sp^2,O2sp^2) pi(C2p, O2p). Also, how do you figure out what the coefficient (number) in front of each orbital is? Thank you.

Brian Cook
Posts: 34
Joined: Fri Sep 28, 2018 12:15 am

Re: HW 2.59 Question

Postby Brian Cook » Mon Nov 26, 2018 9:17 pm

Hey Vana, so both C and O have 3 2SP^2 orbitals and one unhybridized p orbital. The 3 2SP^2 orbitals initially had 1 electron in each orbital but then they're filled up by each sigma bond, whereas the pi bond fills up the unhybridized p orbital. We know it's 2 in front since C and O are on the second period.

Vana Mirzakhani 3I
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

Re: HW 2.59 Question

Postby Vana Mirzakhani 3I » Mon Nov 26, 2018 9:46 pm

Hey Brian, thank you so much for your help!


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