Naming Organic Molecules

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Amber_Carlton_3D
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Naming Organic Molecules

Postby Amber_Carlton_3D » Sun Feb 26, 2017 9:06 pm

Does anyone have any tips for naming complex organic compounds/molecules? Do we just need to memorize them or is there a better method? Thank you in advance!

Chem_Mod
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Re: Naming Organic Molecules

Postby Chem_Mod » Mon Feb 27, 2017 9:56 am

I will cover this in class in detail this week.

First learn the names for the first ten alkanes. This is the foundation for all organic naming.

Linh Ngau 1F
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Re: Naming Organic Molecules

Postby Linh Ngau 1F » Mon Feb 27, 2017 1:29 pm

I've practically had little to no exposure to naming organic molecules (yay HS Chem!), but what I did find helpful was looking up quick videos. Whenever you have free time just before watching YT subscriptions, try watching a quick 10- minute video! This way, you also get exposure to practice naming organic molecules & practice makes perfect :) Hope this helps! Good luck with everything!

Shelby Slaughter 3D
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Re: Naming Organic Molecules

Postby Shelby Slaughter 3D » Mon Feb 27, 2017 5:45 pm

The Introduction to Organic Chemistry text keeps referring to carbocations in Chapter 4. What exactly are these?
Last edited by Shelby Slaughter 3D on Tue Feb 28, 2017 4:24 pm, edited 1 time in total.

Julia Nakamura 2D
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Re: Naming Organic Molecules

Postby Julia Nakamura 2D » Mon Feb 27, 2017 8:14 pm

A carbocation is molecule where the carbon atom only has three bonds, thus giving it a positive charge. They are usually unstable because they do not have eight electrons (they only have six), and therefore do not satisfy the octet rule.

ribal_daniel_3H
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Re: Naming Organic Molecules

Postby ribal_daniel_3H » Mon Feb 27, 2017 10:11 pm


904826427
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Re: Naming Organic Molecules

Postby 904826427 » Wed Mar 01, 2017 5:05 pm

Amber_Carlton_3D wrote:Does anyone have any tips for naming complex organic compounds/molecules? Do we just need to memorize them or is there a better method? Thank you in advance!


Well, the first four types of alkyl groups (methyl, ethyl, propyl, butyl) are all you really need to learn to memorize right now because the remaining ones from pentyl to decyl all use latin/ greek prefixes so you already know them and what they mean.

Caleb Lim 2M
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Re: Naming Organic Molecules

Postby Caleb Lim 2M » Thu Mar 02, 2017 6:29 pm

How should we include names of halogens when naming the whole molecule (I know the name should include carbon and halogens only)

Nasir_Ahmed
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Re: Naming Organic Molecules

Postby Nasir_Ahmed » Thu Mar 02, 2017 9:49 pm

Caleb Lim 2M wrote:How should we include names of halogens when naming the whole molecule (I know the name should include carbon and halogens only)


I'm not sure what you mean by including halogens. I was under the impression that we're only dealing with hydrocarbons, and for those you really only need to know the first 10 in the course reader for our purposes.

Navarro_Bree_1D
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Re: Naming Organic Molecules

Postby Navarro_Bree_1D » Tue Mar 07, 2017 9:04 am

To answer your question, Caleb, you treat halogens the same way you treat substituents on an alkane chain/ring. The halogen has equal rank as any other substituent.

Ex//: CH3CHClCH2CH3 --> 2-chlorobutane

(More examples on page 93 of the Course Reader)

marinarosebrock
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Book Question

Postby marinarosebrock » Thu Mar 09, 2017 1:35 am

On Page 7 of the Introduction to organic chemistry textbook, would the same name for 3-Ethyl-3,5-dimethylheptane if the numbering had started from the opposite side of the molecule?
(shown in the first diagram on the page)

Chem_Mod
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Re: Naming Organic Molecules

Postby Chem_Mod » Thu Mar 09, 2017 9:09 am

No, because numbering the chain in the opposite way would place the ethyl group on carbon 5. That would be a higher number so you have the number the chain the way it is.

Shark
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Re: Naming Organic Molecules

Postby Shark » Fri Mar 10, 2017 3:13 am

which youtube channels would you recommend?

veeksha25
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Joined: Wed Sep 21, 2016 2:56 pm

Re: Naming Organic Molecules

Postby veeksha25 » Fri Mar 10, 2017 2:19 pm

The Khan Academy ones helped me a lot, especially when it came to naming alkenes and alkynes with iso- and sec- etc. prefixes, it was really helpful.

Kaitlin_Ryan_ 3K
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Re: Naming Organic Molecules

Postby Kaitlin_Ryan_ 3K » Sun Mar 12, 2017 3:29 pm

Any tips on remembering the structures for the functional groups?

Yesenia Munoz 1G
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Re: Naming Organic Molecules

Postby Yesenia Munoz 1G » Sun Mar 12, 2017 4:59 pm

I also agree that Kahn Academy is very helpful. I also made flashcards on quizlet to help me memorize the different names.

Cris-1C
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Re: Naming Organic Molecules

Postby Cris-1C » Sun Mar 12, 2017 10:08 pm

Flash cards are the most helpful for me, although sometimes it just helps to constantly copy the name and formation onto a standard sheet of paper.

veeksha25
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Joined: Wed Sep 21, 2016 2:56 pm

Re: Naming Organic Molecules

Postby veeksha25 » Thu Mar 16, 2017 11:06 pm

When you name cyclohexenes, can you go clockwise or counterclockwise in numbering carbons? And also, what role does the double bond play in numbering?

204177206
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Joined: Fri Sep 20, 2013 3:00 am

Re: Naming Organic Molecules

Postby 204177206 » Sat Mar 18, 2017 10:56 pm

I'm a little confused on the numbering. Is it that the functional groups takes priority and therefore have the smallest number, followed by the double bond, and then the substituents would have the largest number?

404757006
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Joined: Wed Sep 21, 2016 3:00 pm

Re: Naming Organic Molecules

Postby 404757006 » Mon Mar 20, 2017 2:03 am

when does the number in between the prefix and suffix in naming a molecule occur?


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