Order of writing halogens
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Order of writing halogens
If you have more than one halogen attached to a carbon ring or chain how do you know which to give the lowest number and then how would you order that in the name?
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Re: Order of writing halogens
You would first figure out all possible sets of numbers for the two halogens and then assign the lowest set of numbers to them. For example, in 5-chloro-2-iodoheptane, 5 and 2 is the lowest set of numbers, as the other possible set would be 3 and 6.
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Re: Order of writing halogens
You would start numbering at the halogen that comes alphabetically first. For example if you had 1-bromo-3-chlorocyclohexane, because "b" comes before "c", you start numbering at the bromo and then go in the direction that gives the chloro the smallest number.
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Re: Order of writing halogens
angelicapayne wrote:You would start numbering at the halogen that comes alphabetically first. For example if you had 1-bromo-3-chlorocyclohexane, because "b" comes before "c", you start numbering at the bromo and then go in the direction that gives the chloro the smallest number.
http://www.chemsink.com/compound/22760233/ here is a picture of the molecule
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