Naming Alkanes with Complex Substituents || Organic Chemistry

Molecules covered:
6-(1-bromo-1-chloroethyl)-4-cyclohexyl-3,5-dimethyl-2,5,8-trimethylnonane 0:17
trans-1-(3,4-dimethylhexyl)-6-ethylcycloundecane 9:49
This video covers two examples on alkane nomenclature with complex substituents. Naming these complex alkanes using IUPAC nomenclature is typically one of the first things covered in an organic chemistry course. Naming organic molecules will only grow in complexity so it is important to get comfortable with the basics.
The compounds covered include hydrocarbons with branches (alkyl groups) and may include a cycloalkane or a halogen such as bromide, chloride, iodide, or fluoride. In addition, there will be at least one complex substituent. Identifying the parent chain, correcting numbering the parent chain, identifying substituents (stuff branched off the parent), alphabetizing, recognizing priorities, correctly naming the complex branches, and forming the final name are all discussed in this video.
Organic chemistry is the study of carbon molecules and carbon-based compounds.
This video is presented by Your Science Tutor. We provide videos in math, chemistry, and physics.

[@lovelymarkles]

i learned more from this video than i did with the first four weeks of our semester istg

[@mwangibrian8960]

Thanks for the concept🤗🤗

[@KBH4]

OMG I was looking for thisss!

[@thomastibbitts8293]

Very helpful examples thank you

[@YourScienceTutor]

Glad it was helpful!

[@Mateo-oz3ew]

Good film :)

[@user-mv8qx4si3u]

Thankyou..❤️

[@tuip1167]

Thank you so much!

[@jasmin9778]

for the second example, why wouldn't the complex substituent be a trimethyl? doesn't the sixth line count as a methyl? sorry for being confusing, it's my first day learning organic chem

[@YourScienceTutor]

The sixth carbon is part of the complex substituent's parent chain. Remember, the parent chain is the LONGEST chain of carbons. If we treated it as a trimethyl, the parent would only be 5 carbons long instead of 6.
As a side note, the parent chain of the entire molecule is the 11-carbon ring as mentioned in the video. However, complex substituents are essentially mini molecules attached to the bigger molecule, and so they get their own parent chain to allow us to properly name them.
Hope this helps!

[@ayusmashu]

Is cyclo hexyl a complex substituents??
Please help

[@YourScienceTutor]

No, it is not a complex substituent unless the cyclohexyl had other groups attached to it, such as a methyl, bromine, etc.

[@ayusmashu]

@@YourScienceTutor thank you so much

[@carterburns6295]

Why don’t we label the chiral centers with R and S notation for the second structure?

[@YourScienceTutor]

Good question. Because it is easier to use, we prefer to use cis/trans when possible. However, you could instead designate each chiral center as (R) or (S) if you wanted to and you would still correctly describe this molecule. Keep in mind that there are some instances when cis/trans would not work on rings, such as if you have three chiral centers that point in different directions, etc. In those cases, you would need to use (R) or (S).
Hope this helps!

[@elizabeth-ty3he]

Why isn’t the longest chain off one of the other branches that make a 9 chain?

[@YourScienceTutor]

Good question. In the first example, if we make the parent chain include that ethyl group off carbon #3, then that new 9-carbon parent chain will have 6 total substituents branching off instead of the 7 off the current parent chain. When we have this situation, the chain with the most branching wins.
I went over a similar situation in example 2 of my previous video.
ruclips.net/video/cdrLRXsOtKA/видео.html
Hope this helps!

[@elizabeth-ty3he]

@@YourScienceTutor thanks!

[@logeshrajap]

Unsaturated = alkene and alkynes

[@acielysian3947]

Alkanes are saturated brother

[@YourScienceTutor]

Correct, good catch!