Drawing Structures

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navessor
Posts: 16
Joined: Fri Sep 25, 2015 3:00 am

Drawing Structures

Postby navessor » Wed Feb 24, 2016 5:26 pm

1.29 Draw a structure of (Z)-3-methyl-3-heptene.

Ronald Yang 2F
Posts: 86
Joined: Fri Sep 25, 2015 3:00 am

Re: Drawing Structures

Postby Ronald Yang 2F » Wed Feb 24, 2016 6:26 pm

The (Z) is essentially like (cis) for a molecule where we could not determine if it was cis or trans due to the fact that there are more than two groups off the double bond, so we use E or Z instead (respectively similar to trans or cis). Trick: Z, Zame, Zide (same side :D). If you were unsure about how to draw it, here's what I think it is. Sorry for the poor picture; my drawing skills aren't exactly on par. If you want further explanation about how I drew this, I looked at the fact that it was an alkene, drew heptene keeping in mind where I put the double bond (3), then when I got to the double bond, I made sure I addressed the (Z). Z, Zame, Zide, so similar to (cis). Then I finished the chain and put the methane substituent at the third carbon. Let me know if anything doesn't make sense!
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Screen Shot 2016-02-24 at 6.17.58 PM.png
(Z)-3-methyl-3-heptene
Screen Shot 2016-02-24 at 6.17.58 PM.png (14.38 KiB) Viewed 312 times

Wesley Shen Lec 4
Posts: 23
Joined: Fri Sep 25, 2015 3:00 am

Re: Drawing Structures

Postby Wesley Shen Lec 4 » Fri Mar 04, 2016 12:02 pm

When drawing trans and cis models, I just draw the line structures first, then make sure the substituents are on the same or opposite sides accordingly.


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