Understanding Saturated Carbon Compounds

In organic chemistry, carbon compounds are classified based on the types of bonds between carbon atoms. A saturated carbon compound is one where all the carbon atoms are linked by only single covalent bonds. This means each carbon atom is bonded to the maximum possible number of other atoms (usually hydrogen or other carbon atoms), and there are no double or triple bonds.

In contrast, unsaturated carbon compounds contain one or more carbon-carbon double bonds (like in alkenes) or triple bonds (like in alkynes). These double and triple bonds represent points of higher reactivity.

Analyzing the Options Provided

Let's examine each option to determine which fits the definition of a saturated carbon compound:

• Option 1: Alkyne

  Alkynes are hydrocarbons containing at least one carbon-carbon triple bond (C≡C). The general formula for alkynes is \(C_nH_{2n-2}\). Because they contain a triple bond, they are classified as unsaturated compounds. For example, ethyne (\(C_2H_2\)) has a triple bond.

• Option 2: Ethylene

  Ethylene, also known as ethene, has the chemical formula \(C_2H_4\). Its structure features a carbon-carbon double bond (C=C). Compounds with double bonds are classified as unsaturated.

• Option 3: Alkene

  Alkenes are hydrocarbons characterized by the presence of at least one carbon-carbon double bond (C=C). Their general formula is \(C_nH_{2n}\). The double bond makes them unsaturated.

• Option 4: Alkane

  Alkanes are hydrocarbons where all the carbon-carbon bonds are single bonds. Their general formula is \(C_nH_{2n+2}\). Since they only contain single bonds between carbon atoms, they are defined as saturated carbon compounds. Methane (\(CH_4\)), ethane (\(C_2H_6\)), and propane (\(C_3H_8\)) are examples of alkanes.

Conclusion: Saturated Compound Identified

Based on the definitions:

• Alkynes are unsaturated (triple bond).
• Ethylene (Ethene) is unsaturated (double bond).
• Alkenes are unsaturated (double bond).
• Alkanes are saturated (only single bonds).

Therefore, the only class of compounds listed that consists entirely of saturated carbon compounds is Alkane.