naming carbon compounds

[stonecold]

okay, so is this the order:

1. Functional groups such as hydroxyl, amino, carboxyl etc.
2. Presence of double/triple bonds carbon bonds
3. Halide groups such as chloro, bromo, idio etc.
4  Alkyl groups such as methyl, ethyl etc.

And would this be:


  H OH  H H  H Cl H
   |  |  |  |  |  |  |
H-C-C-C-C=C-C-C-H
   |  |  | |   | |  |
   H  H H Br H H H

4-bromo-6-chloro-2-hydroxy-hept-4-ene

?

[physics]

okay, so is this the order:

1. Functional groups such as hydroxyl, amino, carboxyl etc.
2. Presence of double/triple bonds carbon bonds
3. Halide groups such as chloro, bromo, idio etc.
4  Alkyl groups such as methyl, ethyl etc.

YESSSS thats correct

one thing i'm not sure of is when u have different things such as a bromo and a hyroxyl which r diffenrt do we put it in alphabetical order? i think not? but not sure

[Souljette_93]

okay, so is this the order:

1. Functional groups such as hydroxyl, amino, carboxyl etc.
2. Presence of double/triple bonds carbon bonds
3. Halide groups such as chloro, bromo, idio etc.
4  Alkyl groups such as methyl, ethyl etc.

YESSSS thats correct

one thing i'm not sure of is when u have different things such as a bromo and a hyroxyl which r diffenrt do we put it in alphabetical order? i think not? but not sure

Do you mean like this:   
   cl  H  H H  H
   |  |  |  |  | 
H-C-C-C-C-C-OH                  Then it is 5-chloropentanol
   |  |  | |   |
   H  H H H   H

[physics]

as in would u name something
2-hydorxyl-4chloro-heptane just because of the importance order or in alphabetical order as always

[stonecold]

do you need the one Souljette?
so 5-chloropentan-1-ol

and it is always alphabetical order anna...

[physics]

do you need the one Souljette?
so 5-chloropentan-1-ol

and it is always alphabetical order anna...

okie dokie thankssssss

[Nomvalt]

Do you mean like this:    
   cl  H  H H  H
   |  |  |  |  |  
H-C-C-C-C-C-OH                  Then it is 5-chloropentanol
   |  |  | |   |
   H  H H H   H

Would you also be able to call this 1-chloro-5-hydroxylpentane?
edit: actually no didn't realise OH was a functional group

[physics]

no cause functional groups r more important then alkyl halides

[Souljette_93]

do you need the one Souljette?
so 5-chloropentan-1-ol

and it is always alphabetical order anna...

Not 100% sure, i usually don't put it because my teacher said that is understood that it is placed on carbon one, however when i did one TSSM trial exam, i got one MCQ's wrong because i chose the option without the 1- numbering, and this is what they said

"There is no need for a 1-as there are no other possibilities,... the third molecule is 1-propanol, the 1- is needed to distinguishing from 2- propanol."

And there was no other compound but aminoethane, propanoic acid & propanol. And now I'm confused on when too place that 1-


Souljette

[stonecold]

http://www.vcaa.vic.edu.au/vcaa/vce/studies/chemistry/assessreports/2009/chemistry_assessrep_june09.pdf

Take a look at question 6b.

You definitely have to include the number for the hyrdoxy group for alkanols propanol and above.

Also, the base name for molecules has the following priority (correct me if i'm wrong):
carboxylic acids > esters > alkanols > amines

[Mao]

For the sake of VCE, you'll always get fairly simple molecules to make, and it'll be pretty clear which ones are primary and which ones are secondary. So the rule simplifies to:

- Identify the functional group that will be assigned by the suffix
- Number the parent chain in a way to minimize the number of the above functional group
- All other functional groups will be assigned by prefixes, group in alphabetical order

Hence, carboxyl groups (COOH) will always be 1, and the hydroxyl group will always be minimized (for the sake of VCE)

[median]

So if u have a carboxyl group and a hyrdoxyl group do u leave "-oic acid" as the suffix and swap the hydroxyl group from "-ol" to "hyroxy-"?

[simonhu81292]

yep ... that's right
there is order of precedence of groups ..