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Postby sandros » Sun Dec 03, 2017 5:20 pm

When writing conjugate acids and bases is there any difference between a specific writing form or another? For example, when asked to write the conjugate acid of CH3NH2 is there a difference between CH3NH3+ and CH4NH2+ or even CH6N+ ? If yes then how do we know which one is correct ?

Jonathan Tangonan 1E
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Joined: Sat Jul 22, 2017 3:01 am

Re: 12.1

Postby Jonathan Tangonan 1E » Sun Dec 03, 2017 5:54 pm

I believe when the molecular formula isn't fully condensed as it is not in the conjugate acid of CH3NH2. The way that it is written would be the best representation of the actual formal structure. In this case, CH3NH3+ is most likely the best representation of this structure where Carbon has the 3 Hydrogens bonded to it while being bonded to Nitrogen which also has 3 Hydrogens bonded to it as well.

Aijun Zhang 1D
Posts: 53
Joined: Tue Oct 10, 2017 7:13 am

Re: 12.1

Postby Aijun Zhang 1D » Sun Dec 03, 2017 6:08 pm

I think CH3NH3+ is the best among the three you gave.
Because when we want a conjugated acid of CH3NH2, you need to add one proton, in other words, one H+ to the molecule. Carbon is already connected to 3 hydrogen and then one N atom with two hydrogen asides. It is more normal to add one on N.
CH3NH3+ is much more understandable than the other two.

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