atomic structure of HOCO

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Stephanie tran 1J
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Joined: Fri Sep 29, 2017 7:04 am

atomic structure of HOCO

Postby Stephanie tran 1J » Sun Nov 12, 2017 3:27 pm

Why is the hydrogen not attached to the carbon in HOCO? Usually when bonded to hydrogens and oxygens, carbon is the main central atom, so I was confused why the correct structure has the hydrogen attached to the oxygen atom and not the carbon atom?

Rebecca Cheung 1E
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Re: atomic structure of HOCO

Postby Rebecca Cheung 1E » Sun Nov 12, 2017 3:33 pm

The H in the molecular formula is next to the O, so when you draw out the lewis structure, you would draw the H bonded with the O and not with C.

Sara Varadharajulu
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Re: atomic structure of HOCO

Postby Sara Varadharajulu » Sun Nov 12, 2017 3:53 pm

i think the formula is written as HOCO to emphasize the order in which the atoms are bonded (which is why its not CH02 or something).

ami patel
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Joined: Thu Jul 27, 2017 3:00 am

Re: atomic structure of HOCO

Postby ami patel » Sun Nov 12, 2017 4:09 pm

i think the way that the molecule is written is indicative of the way that the elements are bonded and structured. that is why it is not written as CHO2. that is why the H is bonded to the O and not to the C. The C also is the radical this structure.

Ya Gao
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Re: atomic structure of HOCO

Postby Ya Gao » Sun Nov 12, 2017 4:22 pm

In these kinds of questions I always assume the way the molecule is written as the way it is bonded.

Gobinder Pandher 3J
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Re: atomic structure of HOCO

Postby Gobinder Pandher 3J » Sun Nov 12, 2017 9:26 pm

Typically for organic molecules like this, the compound is bonded how it is written. So H is bonded to O then to C and then to O.

Ruohan Sun 3I
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Re: atomic structure of HOCO

Postby Ruohan Sun 3I » Sun Nov 12, 2017 9:58 pm

I think that's because oxygen has higher ionization energy.

Nathan Tu 2C
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Re: atomic structure of HOCO

Postby Nathan Tu 2C » Sun Nov 12, 2017 10:10 pm

There are two hints that tell you that hydrogen is attached to oxygen. One is the name since it is next to oxygen in the name. The second part is after calculating formal charges, it would become apparent that H should be attached to O. It makes it more stable to have it on oxygen than on carbon in this case.

Jessica_Singh_1J
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Re: atomic structure of HOCO

Postby Jessica_Singh_1J » Thu Nov 16, 2017 4:58 pm

Another (organic) approach to this problem is to recognize that HOCO is simply a rearrangement of -COOH, the general formula of a carboxylic acid (an organic functional group). Knowing that organic molecules are chains or rings of C, we can conclude that the radical is placed on the carbon atom.


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