Write Lewis structures and IUPAC names for the alkyne isomers of \({C_4}{H_6}.\)

Alkynes are unsaturated hydrocarbons with one or more triple connections between carbon atoms, i.e., one sigma bond and two pi bonds connecting carbon atoms.

Lewis’s structure is a molecule's structural representation in which atoms are joined by lines. Covalent bonds are shown by the lines connecting atoms.

The International Union of Pure and Applied Chemistry (IUPAC) is an organisation that promotes the study of pure and applied chemistry. It is the most organised nomenclature system. The structural formula of a compound is used to name it, and each compound has its own IUPAC name.

The position of the triple bond differs between the two potential alkyne isomers of\({C_4}{H_6}\). The IUPAC name includes the prefix but-, indicating that each isomer has a chain of four carbon atoms, and the suffix-yne, indicating that the chain contains a triple bond.

Alkyne isomers of\({C_4}{H_6}\)have the following Lewis structures:

\(but - 1 - yne\)

\(but - 2 - yne\)