Thoughts On O-Chem

by James

{ 12 comments… read them below or add one }

Nadia June 4, 2012 at 8:54 am

Hi,
I am an organic chemistry teacher overseas: in a french speaking area, actually.
I think you’re doing a great job with this site.

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Pushkar August 31, 2012 at 4:32 am

Does grignard reagent react with HCN to yield a aldehyde??

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james September 4, 2012 at 11:31 pm

No, HCN protonates the Grignard.

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anna September 23, 2012 at 7:05 am

yes it surely can..if thr s any othr group other than hydrogen, the one attachd to CN, it leads to formation of ketones..

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Megan Cole November 25, 2012 at 11:48 pm

After 2 years in college and starting to lose some of that adrenaline that i first had, you and your website have given me that extra boost I need. Thank you so much!

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Patrick C December 5, 2012 at 12:33 pm

I am graduate student in organic chemistry, and I think that your website is quite useful for when I am planning a synthesis or I if I am looking for info a reaction I am little rusty on.

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james December 10, 2012 at 2:22 pm

Thank you, I’m glad you find it helpful!

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Hriday Buyakar June 24, 2013 at 8:50 am

This one is from resonance theory…

Resonance hybrid is considered as the weighted average of the contributing structures. But , in terms of stability , It is treated as the most stable one…more stable than all the resonating structures. Resonating structures have different stabilities…so…when resonance hybrid is treated as an average , It should be placed behind most stable resonating stucture…but why is that not so ?

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Anubhav December 29, 2013 at 12:58 pm

because in hybrid the electon cloud has larger space to be delocalised……not restricted to any particular p- orbital……so electronic repulsion falls drastically leading to increase in stability…..

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J June 27, 2014 at 10:35 pm

Because none of the resonance structures actually exist. What you are drawing is the possible ways in which we could model the structure using our curly arrows, charges and lines for bonds model. The actual real-life structure is a combination of all of these different possible structures, some of which are more stable than others. The electrons are actually in orbitals with direction that we don’t show using the typical organic model of structures; our model doesn’t show all the complexity that is present when there are so many possibilities for where the electron can be located.

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Joanna November 14, 2013 at 10:11 pm

Do you know any websites that might be helpful for the mechanism of converting toluene into a tropylium cation? I’m having trouble with the rearrangement once I have my benzyl cation.

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Charli March 10, 2014 at 6:39 pm

I just started Organic Chemistry I and a question has been bugging me since that first class. Oxygen has 6 valence electrons but when drawing a lewis structure to show the bonds, it has 7. Why???

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