When there are branches in either the acid or the alcohol, how do you name the e

Question

When there are branches in either the acid or the alcohol, how do you name the ester formed from the reaction of these two? For example, what would the ester formed from butan-2-ol and benzoic acid be called? Also, what would the ester formed from ethanol and say, 2-ethyl-3-methylpentanoic acid? (I made these reactants up to illustrate what I mean by my question). Or if both the alcohol and acid have branches. For instance, what would the ester formed from 3-methylbutan-2-ol and 2-ethyl-3-methylpentanoic acid be called? (Again, I made these reactants up.) Thank you!! :)

Explanation / Answer

1st ester PhCOOC(CH3)CH2CH3 - 3 methyl butyl benzoate 2nd ester CH3-CH(CH3)-CH(CH3)-CH2COOCH2CH3 - ethyl 2 , 3 dimethyl pentoate 3dr ester CH3-CH(CH3)-CH(CH3)-CH2COOCH(CH3)-CH(CH3)-CH3 2 , 3 dimethyl propyl 2, 3 dimethyl pentoate IUPAC name of esters is has two parts one is after COO group and other is before COO group. Both parts are named as per IUPAC nomenclature. Later they are joined in order and oate is present at end . Further you can see given below reference http://chemwiki.ucdavis.edu/Organic_Chemistry/Esters/Nomenclature_of_Esters

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