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27th March 2012 @ 12:06
Spectroscopic Method: ATIR-FT-IR
Substituent: Methyl
ATIR-FT-IR Spectrum of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one

ATIR-FT-IR Spectrum of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one

Interpretation of ATIR-FT-IR Spectrum of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one:

ATIRFT-IR Wave Number (cm-1)AssignmentRemarks
3134N-H stretching vibration
(v(N-H) (1o amide)
Symmetrical stretching vibrations of the NH group in the region 3190-3170cm-1
3062Aromatic C-H stretching vibration (v(C-H)C-H aromatic stretching in the region 3100-3000cm-1
3019Aryl-HOften obscured and appears on the region 3010-3040cm-1
2962C-H stretching vibrationsDue to CH3 group in the aromatic ring.
1690C=O stretching vibration (v(C=O)Attributed to the carbonyl functional group.
1604Aromatic ringsDue to presence of aromatic ring
1511Phenyl ringsDue to the vibration of phenyl group at 1450-1600cm-1 region.
1411-O-HO-H bending peaks at the region of 1410-1260cm-1
908Phenyl ringDue to strong polar group of substituent at the phenyl ring
821Aromatic compounds and para-disubstitution on the benzene ringIn the finger print region, one or two strong bands observed in the aromatic compounds in the region 900-690cm-1 and a single strong band between 860-800cm-1 due to para-disubstitution on the ring.
Attached Files
ATIR-FT-IR Spectrum of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one