Organic nomenclature

[Deceitful Wings]

i.e. What would the name of this molecule be?

    H      NH2  H
    |       |       |
H-C-----C-----C-H
    |       |       |
    H      Cl     H

Amino functional group has precedence over chloro...therefore it is 2-chloro propyl-2-amine.

but how do you know that? is there a link you can show me which shows which functional groups are prioritised over the other?

[mihir94]

Here is a sheet my teacher gave my class to help us with the priority of functional groups and naming of hydrocarbons.

[Deceitful Wings]

Here is a sheet my teacher gave my class to help us with the priority of functional groups and naming of hydrocarbons.

Thanks so much, you are a legend!!!! this is EXACTLY what i needed.
+1

[charmanderp]

i.e. What would the name of this molecule be?

    H      NH2  H
    |       |       |
H-C-----C-----C-H
    |       |       |
    H      Cl     H

Amino functional group has precedence over chloro...therefore it is 2-chloro propyl-2-amine.

but how do you know that? is there a link you can show me which shows which functional groups are prioritised over the other?

In this case, just know that chlorine can't have precedence over the amino group because halogen are never used as a suffix! They are not a major functional group!

[mihir94]

Here is a sheet my teacher gave my class to help us with the priority of functional groups and naming of hydrocarbons.

Thanks so much, you are a legend!!!! this is EXACTLY what i needed.
+1

Haha, no worries 

[Mao]

i.e. What would the name of this molecule be?

    H      NH2  H
    |       |       |
H-C-----C-----C-H
    |       |       |
    H      Cl     H

Amino functional group has precedence over chloro...therefore it is 2-chloro propyl-2-amine.

No space. Also, IUPAC uses propan instead of propyl, ethan instead of ethyl, etc.

2-chloropropan-2-amine

This is spot on.

Although I should note that IUPAC naming stops being useful as soon as VCE finishes, after which you name it in however your lecturer wants (I have heard about cases where ethylene gas is the correct answer while ethene(g) was marked incorrect at uni exams). Alternatively, software will happily name your stuff for you.

[jadams]

I knew about how IUPAC using propan instead of propyl etc....but VCE accepts both.

Are VCE examiners as specific in regards to spacing and punctuation? I'm guessing it's a bit hard to be overly precise with handwritten answers.

[Mao]

I knew about how IUPAC using propan instead of propyl etc....but VCE accepts both.

Are VCE examiners as specific in regards to spacing and punctuation? I'm guessing it's a bit hard to be overly precise with handwritten answers.

Use correct IUPAC naming. VCAA might have accepted whatever it is they accepted in the past, but the only 'correct' answer is the IUPAC name. As far as I know, the only answer that will always be guaranteed to be one of the correct answers is the proper IUPAC name, anything else is a slight gamble.

[thushan]

I knew about how IUPAC using propan instead of propyl etc....but VCE accepts both.

Are VCE examiners as specific in regards to spacing and punctuation? I'm guessing it's a bit hard to be overly precise with handwritten answers.

Use correct IUPAC naming. VCAA might have accepted whatever it is they accepted in the past, but the only 'correct' answer is the IUPAC name. As far as I know, the only answer that will always be guaranteed to be one of the correct answers is the proper IUPAC name, anything else is a slight gamble.

Concur. Use the IUPAC name.