Problem 138 - Arihant Objective Approach to Organic Chemistry for IIT JEE and NEET all Medical Entrances Part 4

Question

The compound known as oil of wintergreen is: \(\quad\) |Manipal 2003| (a) phenyl scetate (b) phenyl salicylate (c) methyl salicylate (d) methyl acetate

Step-by-Step Solution

Answer

Oil of wintergreen is methyl salicylate, option (c).

Step 1: Understand the Terminology

"Oil of wintergreen" often refers to a particular aromatic compound. To solve the exercise, we need to identify which of the given options corresponds to this common name.

Step 2: Identify the Scientific Name

The compound known as "oil of wintergreen" is scientifically termed methyl salicylate. It is commonly used in flavorings and liniments.

Step 3: Choose the Correct Option

From the given options, verify which corresponds to methyl salicylate: - (a) phenyl acetate - (b) phenyl salicylate - (c) methyl salicylate - (d) methyl acetate Since oil of wintergreen is methyl salicylate, the correct answer is option (c).

Key Concepts

Aromatic Compounds

Aromatic compounds are a special class of organic molecules renowned for their stability and unique smell. They are primarily made of carbon atoms arranged in a ring-like structure, with delocalized electrons above and below the plane of the atoms. This electron configuration grants these compounds their exceptional stability and distinct aromatic scent.

One of the most famous aromatic compounds is benzene, which serves as a building block for many other similar structures. Aromatic compounds play a significant role in chemistry and industry due to their application in producing dyes, drugs, plastics, and many everyday products. Understanding how these compounds are structured and how they behave chemically is crucial in organic chemistry.

• A ring-shaped configuration of carbon atoms
• Stabilized by delocalized electrons
• Known for their distinct scent

From a practical standpoint, aromatic compounds are central in synthesizing various materials. They also have applications in fine chemical synthesis and material science.

Methyl Salicylate

Methyl salicylate is an organic ester commonly known by its aromatic name "oil of wintergreen." It is a naturally occurring compound found in many plants, and it is especially notable for its pleasant minty aroma. This compound is widely used in flavorings, fragrances, and as a warming agent in topical analgesics.

Chemically, methyl salicylate is formed by the esterification of salicylic acid with methanol. This process combines the carboxylic acid group of salicylic acid with the alcohol group from methanol, resulting in the ester linkage characteristic of methyl salicylate.

• Known as "oil of wintergreen"
• Has a minty aroma
• Produced via esterification of salicylic acid and methanol

Its multifunctionality makes it a valuable ingredient in medicinal products, particularly as a topical pain relief solution.

Common Names in Chemistry

In chemistry, common names are often used alongside systematic names to identify compounds quickly and easily. Common names can be derived from a compound's historical source, its distinctive smell, or other notable characteristics. These names are especially prevalent in the case of well-known chemicals and substances used in daily life.

For instance, the name "oil of wintergreen" is a common name for methyl salicylate. This term highlights the compound's aromatic nature and links it to its traditional use as an extract from wintergreen leaves. While common names are very helpful, they can sometimes lead to confusion without an understanding of the underlying chemical structure.

• Offer quick identification of compounds
• Often derived from historical or sensory properties
• Can complement systematic nomenclature for clarity

By learning both the common and scientific names of compounds, chemistry students can gain a better appreciation and understanding of these molecules and their uses.