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Author: Subject: How do you draw benzene rings?
fusso
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[*] posted on 22-10-2018 at 12:32
How do you draw benzene rings?


Quote:
So, benzene. When you first put pen to a blank piece of paper, you have a number of choices to make. Do you draw the hexagon so that its top and bottom are parallel to the top of the piece of paper, or so that the left and right sides are parallel to the left-hand side of the piece of paper? Or put more simply, is your hexagon sitting on a single point, or is it resting comfortably on one of its sides? Of course, if the benzene ring is part of a larger structure, you might be forced to choose one orientation over another. But if you’re just drawing a single solitary benzene ring, or if you’re not constrained in any way by the bigger picture, do you always start by drawing your benzene ring the same way up?

Orientation aside, once you’ve made that decision, which way do you move the pen? Do you always follow the same sequence of strokes? Do you lift the pen from the paper before completing the hexagon and going on to the double bonds? After giving it some thought, I’m pretty sure I always draw my benzene rings the same way — and if you’d asked me to describe how I did it without actually going through the motion, I’m not sure I would have got the answer right. I guess it’s because it’s second nature; I’ve done it so many times it just happens, and the way I do it is tucked away in my subconscious somewhere. So, for me, I always sit my benzene rings on a point (if I have a choice) and I lift my pen off the paper twice before even completing the hexagon. And I’m pretty sure I always draw the double bonds in the same order and direction as well. Full gory details shown in the picture.

(Source: https://stuartcantrill.com/2011/09/12/drawing-conclusions/)

[Edited on 181022 by fusso]




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VSEPR_VOID
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[*] posted on 22-10-2018 at 12:37


I draw a line that is goes from the top of a line to the next. Then I draw a 60 degree angle and line of similar length. Rinse and repeat three times. Is there a better way?



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[*] posted on 22-10-2018 at 13:04


If you imagine a clock face... I join 12 to 2, 2 to 4, 4 to 6 and so on.
Then I draw a (rough) circle in the middle of it

Except sometimes...
In molecules with linked rings, it's sometimes easier to draw some of the hexagons "sideways" (on a clock you would start by drawing 11 to 1 then 1 to 3 etc).

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[*] posted on 23-10-2018 at 16:30


I am lazy. A circle inside a hexagon. Done. https://www.quora.com/Why-is-there-a-circle-drawn-in-the-mid...
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[*] posted on 23-10-2018 at 16:58


Quote: Originally posted by zed  
I am lazy. A circle inside a hexagon. Done. https://www.quora.com/Why-is-there-a-circle-drawn-in-the-mid...

That's not even lazy- it's more accurate than writing alternating single and double bonds. Unless you're trying to draw a reaction mechanism, at least...




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[*] posted on 23-10-2018 at 17:02


Left, Right, Hat, Pants, circle or bonds as needed.
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VSEPR_VOID
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[*] posted on 23-10-2018 at 18:12


Its more correct to draw a circle inside if there is a resonance, for example in benzene, but individual double bonds must be drawn if there is no resonance, like in C60.



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[*] posted on 23-10-2018 at 18:41


I draw separate bonds but make a point of changing their position in subsequent stages of the reaction until some intermediate locks them in place.



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[*] posted on 28-10-2018 at 08:58


I draw it so that it is sitting on a flat side rather than on a single CH group.

I usually draw a circle inside the hexagon rather than draw the double-bonds
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[*] posted on 28-10-2018 at 09:19


Quote: Originally posted by VSEPR_VOID  
Its more correct to draw a circle inside if there is a resonance, for example in benzene, but individual double bonds must be drawn if there is no resonance, like in C60.

If C60 had no "long range" resonances it would be colourless like benzene.
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[*] posted on 28-10-2018 at 15:12


I draw mine more or less the same as j_sum1, its a flawless method.
First you draw 2 parallel lines vertically, this sets the size of your ring, then you simply put 2 dots at the top and bottom where you want the 2 other corners to be and then fill in where the lines need to be followed by drawing the double bonds (i prefer double bonds to the circle cause it looks prettier).
A perfect benzene ring everytime.

[Edited on 28-10-2018 by Assured Fish]




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[*] posted on 28-10-2018 at 19:22


They're actually much easier to draw if you just draw them on edge.

Then they're just a straight line 2 bonds long.

It's all a matter of perspective.




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