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Topic: Organic Chemistry Homework Questions  (Read 2874 times)

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Offline Jessica508

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Organic Chemistry Homework Questions
« on: June 01, 2013, 06:25:37 PM »
Did I do all of these right? Thanks

{MOD EDIT -- smaller image}
« Last Edit: June 01, 2013, 07:53:48 PM by Arkcon »

Offline RaInBowDaSh1488

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Re: Organic Chemistry Homework Questions
« Reply #1 on: June 01, 2013, 06:51:51 PM »
Everything looks right. 1.) B is a bit ambiguous and the answer might vary between classes. IMO the the answer might be different in a inorganic class vs a organic class vs a general chem class. I think you are correct though.

Regarding 4, you just need to take a look at the sulfurs and oxygens and figure out the number of non-bonding electrons on each.


Offline Jessica508

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Re: Organic Chemistry Homework Questions
« Reply #2 on: June 01, 2013, 09:26:40 PM »
Thanks so would this be right for number 4?


Offline RaInBowDaSh1488

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Re: Organic Chemistry Homework Questions
« Reply #3 on: June 01, 2013, 11:27:32 PM »
No not quite. In the first one the sulfurs are equivalent so in any case, they should both hard the same number of electrons in non-bonding orbitals. In this case, you can treat sulfur like oxygen. If it has two 4 electrons in bonding orbitals then it has four NBMO's and is neutral.

For the second one, keep in mind that you can apply the same thing to oxygen (they are both in the same group). The carbonyl oxygen has a double bond and two pairs of electrons in NBMO's. The anionic oxygen only has one bond, so it must have 3 pairs of electrons in NBMO's.

Hope this helped. Just keep in mind that both oxygen and sulfur generally both prefer to have 2 pairs of electrons in NBMO's.

Offline antimatter101

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Re: Organic Chemistry Homework Questions
« Reply #4 on: June 01, 2013, 11:29:20 PM »
Excuse me, what happens when ammonia dissolves in water???

Offline Jessica508

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Re: Organic Chemistry Homework Questions
« Reply #5 on: June 02, 2013, 12:14:47 AM »
So would it be like this?

Offline RaInBowDaSh1488

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Re: Organic Chemistry Homework Questions
« Reply #6 on: June 02, 2013, 12:21:19 AM »
Yes except that the carbonyl oxygen (the one with the double bond to carbon) has 4 non bonding electrons. Remember, oxygen often has 2 pairs of electrons in bonding orbitals and two pairs in NBMOs. The two pairs in bonding orbitals can be in two sigma bonds or in this case, a sigma bond and a pi bond.

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