Naming Alkenes according to IUPAC Rules including cis/trans and E/Z

This is a lesson about naming alkenes according to IUPAC Rules. The lesson also goes into identifying stereoisomerism, and assigning the isomers cis/trans or E/Z, the latter by learning how to assign priority. Don't forget to download the worksheets.

[sprolo]

Thank you for not complicating an already complicated process! Sometimes, these tutorial videos, while well-meaning, leave me even more confused. Very helpful, thanks!

[foodparadise]

No body tells me the important of recognizing whether if it's a stereo isomer first and then if it's disubstituted. This video really clears the mysteries for my exams. Thanks

[Emk]

On 4:03, can the compound be called 3-butyl-1-octene?

[g.davidtenenbaum]

Great instructional video. Thank you! However, I do not see any link to the worksheets. Where can I find them?

[diamandis]

How is 14:41 a hexene? wouldnt' the CH(CH3)2 be considered 3 Carbon's, not 2, since there are two CH3's?

[SKY]

Thank you so  much!  


 You save a lot of Lives.

[Dannyboy]

NIce video but could the cyclohexane at 17:30 be labeled 2, 3 dimethylcyclohexene?

[JumpinBrenFlash]

This video has been helpful! Thanks for sharing!

[GreenMarble]

Are Z/E designations not used in rings at all?

[edwardsenor]

On small cyclic alkenes E and Z are not used because the double bonds must go inward (cis or Z) to make the molecule geometrically possible/stable. On larger cyclic molecules, you would need a designation (around 7 or more carbons)

[mcfl]

I am curious though, how would you name something like number 11 which has both the triple and double bond?

[TheChemDoc]

Hi Dannyboy1277, unfortunately the name 2, 3-dimethylcyclohexene would not be possible. The reason is by doing so you violate one of the first rules, which is giving the lowest number to the first substituent. Even though the second substituent in your case gets a lower number, but it's irrelevant and only the first substituent counts.

[withloveamira]

lol I can hear your Arabi accent :P
thank you for this!...test tomorrow ;(

[SKY]

The last one should be 2, 3- diMethylCycloHexene

[alanliang]

14.48 I don't think the naming is right