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Do slants make a difference in structural formulas?

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Do slants make a difference in structural formulas?

Postby kylera » Sat Feb 16, 2013 9:25 am

Hi, first-time poster here.

A question in my textbook asked me to draw a structural formula for C2H4. For that, my original answer was as follows:

Code: Select all
H   H
|   |
C = C
|   |
H   H


However, in the answer section, it showed this:

Code: Select all
H        H
  \     /
   C = C
  /     \
H        H

Does the slant make a major difference when depicting structural formulas?

Much thanks in advance, and really sorry for the poor expression there with the formulas.
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Postby JackBean » Sat Feb 16, 2013 9:48 am

That depends on how much structural you wanna have it. In 3D or is 2D OK? Becuase in 2D you will reach a point where you won't have other option that to use the straight lines (already with propane).
If you want real 3D structure, than you will need more than slants anyway (there are either full or dashed triangles for that).
In conclusion, it is only coincidence that for ethene you can make it as it is in your book and not saying whether it is 2D or 3D. It's always better to show the angles if you can, but I would not consider your way as mistake if you wrote it into my test.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby kylera » Sat Feb 16, 2013 12:19 pm

Thank you for your answer, I shall keep that in mind.
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