Question

the following group has infarred range- c=c stretching, c-c stretching, c=c bonding, c=o stretching​

Answer 1

Answer:

what does it means brother?

Answer 2

C=O bond has the strongest infra-red (IR) absorption

Explanation:

• A polar bond is said to IR active whereas a non-polar bond is usually IR inactive.
• The C=O bond present in simple ketones,  aldehydes as well as carboxylic acids absorb around 1710 $cm^-^1$
• IR region is said to be just below red color wavelength in the visible region.   The wavelength is usually between 2.5 - 25 um.
• Conjugation of C=O with C=C lowers the  stretching frequency .
• The C=O group of an amide group absorbs at a much lower frequency. However , the C=O for an ester molecule shows absorption at a higher frequency.