Sciencemadness Discussion Board

chemsketch

Magpie - 3-11-2015 at 09:12

Shown below is the chemsketch formula for acetic acid. Would someone please tell me how to convert this to the acetate ion.

Thanks for your help.



chemsketch acetic acid.gif - 1kB

Detonationology - 3-11-2015 at 09:25

The H attached to the O dissociates in water with a constant of 4.76pKa, making H+ and CH3COO-ions. I hope that answers what you are asking... or do you know something I don't?

[Edited on 11-3-2015 by Detonationology]

[Edited on 11-3-2015 by Detonationology]

Darkstar - 3-11-2015 at 09:37

I think what he means is how to do it in the actual program. Unfortunately, I only have experience using ChemDraw (amazing program, by the way) and BKChem, so I couldn't tell you exactly; however, if it's anything like ChemDraw, you would just select the text tool and click on the hydroxyl group, then delete the H. The program would then alert you that oxygen doesn't have enough bonds to be neutral. Then simply select the symbol for a negative charge and put it on oxygen. Or if you really want to get fancy, you could add a dashed double bond (one solid, one dashed) between both oxygens to show electron delocalization, and then put the negative charge symbol right in-between them.

[Edited on 11-3-2015 by Darkstar]

Detonationology - 3-11-2015 at 09:39

Facepalm.
I thought we were being trolled by a senior member :P

Darkstar - 3-11-2015 at 09:43

Quote: Originally posted by Detonationology  
Facepalm.
I thought we were being trolled by a senior member :P


Yeah, I was caught off-guard by his question, too.

Magpie - 3-11-2015 at 10:13

Yes, I want to know how to do this in chemsketch :D.

I find that chemsketch is hard to use. This is most likely because I don't use it often. But also could be due to the fact that I did not grow up using computers. It has one big advantage, however: it is free.

UC235 - 3-11-2015 at 10:18

I enjoy chemsketch and find the drawing tools more intuitive than chemdraw (and often used it in place of such when I still had access).

To change charges, on the structure side, look under the elements on the left side at the bottom. There is a small button that looks like >> but pointing downward. Click that, then the tab that has a + sign (middle one), and select -

Then, click on the oxygen and it will remove the H and add a - sign.

Magpie - 3-11-2015 at 11:18

Thanks so much UC235! Worked like a charm :D.

CharlieA - 3-11-2015 at 11:19

I just downloaded the free program Chemsketch and I am looking forward to playing with it. If you Google "chemsketch tutorial" you will get a list of several Youtube videos and PDF's.:)

AvBaeyer - 4-11-2015 at 19:16

FYI,

There is another free download called ISISDraw. It's pretty sophisticated but, in my opinion and experience, easier to use than CHEMDraw. It does have a learning curve but is worth the effort.

AvB

Detonationology - 7-11-2015 at 15:22

Quote: Originally posted by AvBaeyer  
There is another free download called ISISDraw. It's pretty sophisticated but...

That is not a very friendly sounding name :P Hopefully the FBI won't show up at my house downloading a file with a name similar to a Muslim extremist organization.

Pumukli - 8-11-2015 at 12:07

They wanted to let you go at first but after they saw your username in SM they changed their minds. :D

(Sorry, I couldn't resist.)