c) A compound must have an appropriate number of electrons inte cyclic arrangeme

Question

c) A compound must have an appropriate number of electrons inte cyclic arrangement of orbital d Alfof the abo 19. 3. Censider the iR the seectivmfar a s", r. o, ramine? Deserse the makes, to juse*your answer( 20. What re the major absorptions in functional group region for each compound?(10) do the isomers of molecular formula C, HO differ in IR Spectra? ( at least show the structures of two isomers, show their major peaks in functional group region and which peaks will help differentiate them to justify your answer ) (10) 22. Draw the most stable radicals that can result from cleavage of a C-H bond in each molecule. (10)

Explanation / Answer

NOTE:Q-21 and Q-22 was not clearly showing.  

Q-19

Ans: Compound Shows expected IR absorption peak

In primary, secondary and amine was separated by IR absorption peak in as shown in below

Primary amines show two weak absorption bands, one at 3300-3400 cm-1 regionand other at 3250-3300 cm-1 region. These bands represent respectively, the “free” asymmetrical and symmetrical stretching modes.

Secondary amines show a single weak band in the 3310-3350 cm-1 region. Tertiary amine do not absorbin this region.

Q-20

Ans:Absorption peak of functional group was shown in below:

C=C stretching 1640-1667

2alcohols, cyclic structure lowers the frequency of C-O absorption.100-1070

–C=O stretching 1715cm-1

N-H stretching:3300-3400

1. pent-1-ene

C=C stretching 1640-1667

1. cyclohexanol

2alcohols, cyclic structure lowers the frequency of C-O absorption.100-1070

1. cyclohexanone

–C=O stretching 1715cm-1

1. cyclopropanamine

N-H stretching:3300-3400

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