Detergent is a cleaning agent that is widely used in various purposes. One type of detergent is anionic detergent which is generally a sodium salt of a sulfonic acid such as sodium dodecylbenzene sulphonate. Write the correct reagent (not synthone) for I-IV ! The correct sodium dodecylbenzene sulphonate disconnection strategy is through pathway a or b ?

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Detergent is a cleaning agent that is widely used in various purposes. One type of detergent is anionic detergent which is generally a sodium salt of a sulfonic acid such as sodium dodecylbenzene sulphonate. Write the correct reagent (not synthone) for I-IV ! The correct sodium dodecylbenzene sulphonate disconnection strategy is through pathway a or b ?

**Understanding Linear Alkylbenzene Sulfonate (LABS)**

The image provided depicts the chemical structure of Linear Alkylbenzene Sulfonate (LABS), a commonly used surfactant in detergents and cleaning products. It also includes a diagram for understanding the positional differences in its molecular structure.

**Chemical Structure:**

- The molecular formula part shown is CH₃(CH₂)₁₁- and is attached to a benzene ring with a sulfonate group (SO₃⁻ Na⁺) attached to the benzene ring.
- The benzene ring is depicted with locants 'a' and 'b' indicating positions where substitutions can occur on the ring.
- The 'wavy lines' connecting the 'a' and 'b' positions to the benzene ring denote possible positions where different functional groups or chains can attach.

**Diagram Explanation:**

- The diagram shows two arrows indicating two possible pathways based on positions 'a' and 'b'.
- These arrows lead to four boxed areas (labeled I, II, III, and IV) showing different products or intermediate compounds that might form depending on whether the substitution took place at position 'a' or 'b'.

**Positional Isomers of LABS:**
The different positional isomers of LABS yield variations in properties and performance as surfactants. The structure's linear long-chain alkyl group confers the right hydrophobic tail which, when conjoined with the hydrophilic sulfonate head, effectively lowers the surface tension of water.

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In educational settings, such diagrams support learning by visualizing the structure to understand the substitution effects on benzene rings and how these affect the surfactant properties of LABS.
Transcribed Image Text:**Understanding Linear Alkylbenzene Sulfonate (LABS)** The image provided depicts the chemical structure of Linear Alkylbenzene Sulfonate (LABS), a commonly used surfactant in detergents and cleaning products. It also includes a diagram for understanding the positional differences in its molecular structure. **Chemical Structure:** - The molecular formula part shown is CH₃(CH₂)₁₁- and is attached to a benzene ring with a sulfonate group (SO₃⁻ Na⁺) attached to the benzene ring. - The benzene ring is depicted with locants 'a' and 'b' indicating positions where substitutions can occur on the ring. - The 'wavy lines' connecting the 'a' and 'b' positions to the benzene ring denote possible positions where different functional groups or chains can attach. **Diagram Explanation:** - The diagram shows two arrows indicating two possible pathways based on positions 'a' and 'b'. - These arrows lead to four boxed areas (labeled I, II, III, and IV) showing different products or intermediate compounds that might form depending on whether the substitution took place at position 'a' or 'b'. **Positional Isomers of LABS:** The different positional isomers of LABS yield variations in properties and performance as surfactants. The structure's linear long-chain alkyl group confers the right hydrophobic tail which, when conjoined with the hydrophilic sulfonate head, effectively lowers the surface tension of water. --- In educational settings, such diagrams support learning by visualizing the structure to understand the substitution effects on benzene rings and how these affect the surfactant properties of LABS.
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