4. Alkanes and Cycloalkanes

Which of the following is the correct structure for 4-bromo-2-hexyne?

Given the following structure: ${\mathrm{CH}}_2={\mathrm{CH}}_2$, select the correct common name and/or IUPAC name for the compound.

Which of the following statements correctly describes the name $3$-ethyl-$5$-isobutyl-$3$-methylnonane according to IUPAC nomenclature rules for alkenes?

Given the structure shown in mc012-1.jpg, what is the correct IUPAC name for the molecule?

Which of the following structures corresponds to the sleeping pill ramelteon, an alkene-containing compound used for insomnia treatment?

Which of the following is the correct IUPAC name for a straight-chain alkene with $8$ carbon atoms and a double bond starting at carbon $1$?