Can I Name These Haloalkenes Using the Preferred Numbering System?

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The discussion addresses the naming of two haloalkenes based on the preferred numbering system. For the first compound, it is clarified that the correct name should prioritize the lowest possible numbering, making "3-bromo-5-fluorohexane" incorrect. The second compound's naming is debated, with a suggestion that "2-iodo-1-methylcyclohexane" is preferable over an alternative that would assign higher numbers. The key takeaway is the emphasis on using the lowest numbers for substituents in chemical nomenclature. Proper application of these rules is essential for accurate naming in organic chemistry.
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Homework Statement



for the substance on the left of first photo, can I name it as 3-bromo-5fluorohexane? for the substance on the right can I name it as 2-iodo-1methylcyclohexane?



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kelvin macks said:
can I name it as 3-bromo-5fluorohexane

No. You should choose numbers so that they are lowest possible.

I am not sure about the other one. I think numbering them 1, 2 is preferred over 2, 1 - it is the same rule as above, 1, 2 is considered the lower of two series.
 

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