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    What is the systematic name for "isooctane"
    AND
    What is the name of (CH3)3CCH2CH3
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    (Original post by Graseax15)
    What is the systematic name for "isooctane"
    AND
    What is the name of (CH3)3CCH2CH3
    :hi:
    Best way of starting this question is drawing the molecule!
    Then you've got to find the largest chain and then see what substituents you have and in which positions by labelling/numbering the carbon chain of the molecule you just drew out
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    (Original post by Graseax15)
    What is the systematic name for "isooctane"
    AND
    What is the name of (CH3)3CCH2CH3
    The 'iso' part of an alkanes name doesn't tell you much about the structure. It means it is an isomer (branched chain version) of the alkane, in this case an isomer of octane. The use of 'iso' *usually* means there is a methyl group in a penultimate carbon of the main chain.
    Iso octane is usually used for 2,2,4-trimethylpentane. This has 3 methyl groups on penultimate carbons.

    Your other example is 2,2-dimethylbutane. Draw out the structure and you can see how the name is derived.
 
 
 
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