Draw the condensed structural formula for the following hydrocarbons: 2-heptyne
The Correct Answer and Explanation is:
Condensed Structural Formula for 2-Heptyne
The condensed structural formula for 2-heptyne is:
CH₃C≡CCH₂CH₂CH₂CH₃
Explanation
1. Understanding Hydrocarbons:
Hydrocarbons are organic compounds composed exclusively of carbon (C) and hydrogen (H) atoms. They can be classified into aliphatic and aromatic hydrocarbons. Aliphatic hydrocarbons are further divided into alkanes, alkenes, and alkynes. Alkanes have single bonds, alkenes have double bonds, and alkynes contain triple bonds.
2. Identifying the Compound:
2-Heptyne is an alkyne, indicated by the presence of a triple bond between two carbon atoms. The “2” in its name signifies that the triple bond starts at the second carbon atom in the carbon chain.
3. Carbon Chain:
The name “heptyne” indicates that the hydrocarbon contains seven carbon atoms in total (as “hepty-” denotes seven). The carbon chain is represented as follows:
[ \text{C}_1 – \text{C}_2 – \text{C}_3 – \text{C}_4 – \text{C}_5 – \text{C}_6 – \text{C}_7 ]
4. Position of the Triple Bond:
Since the triple bond is between the second and third carbon atoms, we represent it as ( C_2 \equiv C_3 ). Therefore, we can visualize the structure as:
[ CH_3 – C \equiv C – CH_2 – CH_2 – CH_2 – CH_3 ]
5. Condensed Structural Formula:
In condensed structural formulas, we represent groups of atoms compactly. Each carbon atom is shown with its respective hydrogen atoms, and the triple bond is explicitly indicated. The formula highlights that the first carbon (C1) is bonded to three hydrogen atoms (making it a terminal carbon), while the subsequent carbons are attached as specified, with the triple bond at C2 and C3.
Overall, the condensed structural formula for 2-heptyne provides a clear representation of the molecule, showcasing the carbon chain and the location of the triple bond within the structure.