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Systematic Naming / Nomenclature Problem

jackbauer

Posted 28 August 2006 - 05:29 PM

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. dry.gif I think if you click it, a pop-up appears with it enlarged.

Thanks smile.gif

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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 *~*

jackbauer

Posted 28 August 2006 - 06:04 PM

My apologies wacko.gif
that picture should have looked like this:

[attachmentid=200]

so would it be

2,2,4- trichlorobutane

or

1,3,3- trichlorobutane?

QUOTE(Pammy @ Aug 28 2006, 06:41 PM) View Post

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? unsure.gif

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Pammy

Posted 28 August 2006 - 06:18 PM

QUOTE(jackbauer @ Aug 28 2006, 06:04 PM) View Post


QUOTE(Pammy @ Aug 28 2006, 06:41 PM) View Post

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? unsure.gif



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 !! smile.gif


jackbauer

Posted 28 August 2006 - 07:02 PM

right, thanks Pammy! smile.gif

mystic

Posted 21 November 2006 - 02:29 PM

i second pammy on that


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