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    In the name "trichloromethane", why wouldn't one use numbers, naming it "1,1,1-trichloromethane"?

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    Hi Dear,

    ** Please see the attached file for the complete solution response **

    In the nomenclature of alkanes, substituents are given the lowest possible number from the parent chain. The lowest possible number starts from 1 (one). As an example, the figure below shows three alkanes with substituents and how the lowest number is assigned to the substituents:
    (please see the attached file)

    In (a) above, if you start from either side of the carbon atoms, you can count only one (1) carbon before you get to the ...

    Solution Summary

    This solution explains why one wouldn't use numbers in naming trichloromethane.