0

ADNAN MUHAMMED

Grade 12,

Courses New

How do we know if a compound gives Schiff’s reagent test or not?

How do  we know if a compound gives Schiff’s reagent test or not?

Grade:12

1 Answers

Aarti Gupta
askIITians Faculty 300 Points
8 years ago
Schiff,s test is an general chemical test for detection of aldehydes.This reaction was developed by Hugo Schiff.The Schiff reagent is the reaction product of a dye formulation like fuchsin and sodium bisulfite; pararosaniline and new fuchsin.The unknown sample is added to the decolorized Schiff reagent,when aldehyde is present a characteristic magenta color develops which is use as a qualitative test for aldehydes.In the reaction Schiff reagent acts as a nucleophile that adds to the carbonyl group of an aldehyde.Because this nucleophile is extremely bulky,a ketone, which is more sterically crowded than an aldehyde at the carbonyl carbon,does not react with Schiff's reagent,and thus does not produce the magenta color. Production of the magenta color therefore indicates that the unknown sample is an aldehyde and not a ketone.Thus aldehydes with carbonyl group gives this test,but if an organic compound gives test for carbonyl group but fails to give Schiff ’s test then it is a ketone.

Think You Can Provide A Better Answer ?

Other Related Questions on Organic Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More