Naming cycloalkanes

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Sonia Perez 1G
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Naming cycloalkanes

Postby Sonia Perez 1G » Tue Mar 01, 2016 7:04 pm

When naming cycloalkanes does using -pent or -penta matter? For the following example, would both answers be considered correct?

5-methylcyclopenta-1,3-diene
5-methylcyclopent-1,3-diene

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Re: Naming cycloalkanes

Postby Chem_Mod » Tue Mar 01, 2016 9:06 pm

The extra vowel is there only when its followed by a numerical prefix. The following are correct:

pent-3-ene (number inserted into the word pentene)
penta-1,3-diene (numbers inserted into the word pentadiene)


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