Hi,

Can anyone please advise:

what is the correct name of the chemical structure, and why ?

[attachmentid=199]

Is it 2,2,3-trichlorobutane

or

1,3,3-trichlorobutane?

I hope this picture turns out OK. I think if you click it, a pop-up appears with it enlarged.

Thanks

## Systematic Naming / Nomenclature Problem

### Pammy

Posted 28 August 2006 - 05:41 PM

I would call that

1,2,3-tricholorobutane because there is a Cl on the 1st, 2nd and 3rd carbon.

And it would not be 2,3,4-trichlorobutane because you must number them so the numbers are as small as possible, does that make sense ?

Hope that helps !!

*~* Pam xxx *~*

1,2,3-tricholorobutane because there is a Cl on the 1st, 2nd and 3rd carbon.

And it would not be 2,3,4-trichlorobutane because you must number them so the numbers are as small as possible, does that make sense ?

Hope that helps !!

*~* Pam xxx *~*

### jackbauer

Posted 28 August 2006 - 06:04 PM

My apologies

that picture

[attachmentid=200]

so would it be

2,2,4- trichlorobutane

or

1,3,3- trichlorobutane?

you must number them so the numbers are as small as possible

ah, so if the numbers are to be as small as possible it would be 1,3,3 trichlorobutane?

but aren't you supposed to number from the side with the greatest bumber of functional groups?

that picture

*should*have looked like this:[attachmentid=200]

so would it be

2,2,4- trichlorobutane

or

1,3,3- trichlorobutane?

you must number them so the numbers are as small as possible

ah, so if the numbers are to be as small as possible it would be 1,3,3 trichlorobutane?

but aren't you supposed to number from the side with the greatest bumber of functional groups?

### Pammy

Posted 28 August 2006 - 06:18 PM

you must number them so the numbers are as small as possible

ah, so if the numbers are to be as small as possible it would be 1,3,3 trichlorobutane?

but aren't you supposed to number from the side with the greatest bumber of functional groups?

Yes it would indeed be 1,3,3-trichlorobutane

You should number from the side with the greatest number of functional groups, but this question has no functional groups !! Therefore, just keep your numbers as low as possible !!