what is the chemical structure and spin and integration Nucl

what is the chemical structure and spin and integration

Nuclear Magnetic Resonance Spectroscopy HNMR Spectrum 7 CsHzO2. IR contains a C-o 6H 3H 2H 1H 4.0 Proto 1,0 PPM Peak letterChemical shift (ppm) Spin-spin splitting Integration Chemical structure: Degree of unsaturation:

Solution

Analysis of proton NMR:

peak a) chemical shift=0.9-1.0ppm, splitting =doublet(d),integration=6H --->Alkyl group ,(CH3)2C- present with 6 equivalent protons

peak b)chemical shift=1.9-2.0ppm, splitting =multiplet(m),integration=1H -->(CH3)2-CH-CH2, CH or methine coupled with 6H (equivalent ) and 2H

peak c)chemical shift=2.0ppm, splitting =singlet(s),integration=3H (CH3 alpha to C=O) CH3CO-

peak d)chemical shift=3.8-3.9ppm, splitting =doublet(d),integration=2H,-CH-CH2 -O,protons near O

2H coupled with 1H of CH giving doublet

degree of unsaturation=2C+2+N-H-X/2=2*6+2+0-12-0/2=1 (1 double bond only C=O)

C=# of carbons

N=# of nitrogens

X=# of halogens

H=# of hydrogens

structure : (CH3)2-CH-CH2-O-CO-CH3