Priority in Numbering
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Priority in Numbering
So is it true that all functional groups except for halogens have the priority for the lowest numbering?
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- Posts: 28
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Re: Priority in Numbering
This is true. We tend to start the chain at the functional group, however we treat halogens as a substituent. We number and name halogens based off alphabetical order or lowest number chain.
Re: Priority in Numbering
An example of functional groups having priority over halogens is in the course reader page 104
ClCH2CH2CH(OH)CH3 here the alcohol functional group gets numbered as 2 and the chlorine is 4 because functional groups get priority in numbering over substituents and double/triple bonds
ClCH2CH2CH(OH)CH3 here the alcohol functional group gets numbered as 2 and the chlorine is 4 because functional groups get priority in numbering over substituents and double/triple bonds
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