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Nomenclature question


hellomister
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In a cyclic alkene with one double bond and a methyl group on the carbon of that double bond, is it necessary to state the position of the methyl group?

Do i really need to write 1-methylcyclobutene for instance?? wouldnt you just assume the methyl group is on the first carbon of the double bond? if you didnt have a number? Thanks.

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You can only get away with not putting a number, when there is only one place the group could go. Ex: methylpropane. 1 and 3 methylpropanes don't make sense, as they would be n-butane. Therefore, the only methylpropane is 2-methylpropane.

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basically, in science if someone has to make assumptions to figure out exactly what you mean then you aren't doing a very good job. if you make assumptions you have to state very clearly exactly what those assumptions are and possibly justify those assumptions to some extent.

 

the less assumptions that need to be made the better.

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  • 4 months later...

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