A compound with a molecular formula of ${\text{C}}_6{\text{H}}_{14}$ has two tertiary carbons. Its IUPAC name is:

A tertiary carbon is a carbon atom attached to three other carbon atoms.$n$ -hexane: ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{CH}}_2{\text{CH}}_2{\text{CH}}_3$. (Zero tertiary carbons).2-methylpentane: ${\text{CH}}_3{\text{CH(CH}}_3{\text{)CH}}_2{\text{CH}}_2{\text{CH}}_3$. (One tertiary carbon at C2).2,2-dimethylbutane: ${\text{CH}}_3{\text{C(CH}}_3{\text{)}}_2{\text{CH}}_2{\text{CH}}_3$. (One quaternary carbon at C2, zero tertiary).2,3-dimethylbutane: ${\text{CH}}_3{\text{CH(CH}}_3{\text{)CH(CH}}_3{\text{)CH}}_3$. (Two tertiary carbons at C2 and C3).