All Notebooks | Help | Support | About
Archives
Sections
Substituent
Spectroscopic Method
Tools
Show/Hide Keys
6th May 2012 @ 17:02
Spectroscopic Method: ATIR-FT-IR
Substituent: Bromo
ATIR-FT-IR Spectrum of (3E)-3-(4-Bromobenzylidene)-1,3-dihydro-2H-indol-2-one

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


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

ATIRFT-IR Wave Number (cm-1)AssignmentRemarks
3141N-H stretching vibration
(v(N-H) (1o amide)
Symmetrical stretching vibrations of the NH group
3077Aromatic C-H stretching vibration (v(C-H)C-H aromatic stretching in the region 3100-3000cm-1
3024Aryl-HOften obscured and appears on the region 3010-3040cm-1
2898C-H stretching vibrationSaturated C-H stretching at the region 2840-2930cm-1
1700C=O stretching vibration (v(C=O)Attributed to the carbonyl functional group and shows strong bands at 1650-1900cm-1.
1611Benzene RingDue to presence of aromatic ring
1485Phenyl GroupDue to skeleton vibration of the phenyl group bands at 1500, 1580 and 1600cm-1
1204Aromatic aliphaticVery strong bands on the region 1300-1200cm-1
743C-BrSharp weaker bands on the region 750-500cm-1
Attached Files
6th May 2012 @ 16:53
Spectroscopic Method: ATIR-FT-IR
Substituent: Chloro
ATIR-FT-IR Spectrum of (3E)-3-(4-Chlorobenzylidene)-1,3-dihydro-2H-indol-2-one

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


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

ATIRFT-IR Wave Number (cm-1)AssignmentRemarks
3139N-H stretching vibration
(v(N-H) (1o amide)
Symmetrical stretching vibrations of the NH group in the region 3190-3170cm-1
3078Aromatic C-H stretching vibration (v(C-H)C-H aromatic stretching in the region 3100-3000cm-1
3023Aryl-HOften obscured and appears on the region 3010-3040cm-1
2963C-H stretching vibrationsDue to CH3 group in the aromatic ring.
2899C-HSaturated C-H stretching at the region 2840-2930cm-1
1700C=O stretching vibration (v(C=O)Attributed to the carbonyl functional group and shows strong bands at 1650-1900cm-1.
1612Aromatic ringsDue to presence of aromatic ring
737C-HC-H out of plane deformation shows ortho-disubstituted benzene ring on the region 770-735cm-1
668C-ClDue to the presence of C-Cl bond shows band on the region 800-600cm-1
Attached Files
6th May 2012 @ 16:30
Spectroscopic Method: ATIR-FT-IR
Substituent: Nitro
ATIR-FT-IR Spectrum of (3E)-3-(4-Nitrobenzylidene)-1,3-dihydro-2H-indol-2-one

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


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

ATIRFT-IR Wave Number (cm-1)AssignmentRemarks
3073Aromatic C-H stretching vibration (v(C-H)C-H aromatic stretching in the region 3100-3000cm-1
2961C-H stretching vibrationsDue to CH3 group in the aromatic ring
2842C-H stretching vibrationsDue to CH2 groups in the region 2925-2850cm-1
1697C=O stretching vibration (v(C=O)Due to the carbonyl functional group
1512Phenyl ringsDue to the vibration of phenyl group at 1450-1600cm-1 region.
1403C-NO2Due to asymmetrical and symmetrical stretching of the NO bonds on the region 1390-1340cm-1
1202Aromatic aliphaticVery strong bands on the region 1300-1200cm-1
Attached Files
6th May 2012 @ 16:12
Spectroscopic Method: ATIR-FT-IR
Substituent: Methoxy
ATIR-FT-IR Spectrum of (3E)-3-(4-Methoxybenzylidene)-1,3-dihydro-2H-indol-2-one

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


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

ATIRFT-IR Wave Number (cm-1)AssignmentRemarks
3146N-H stretching vibration
(v(N-H) (1o amide)
Symmetrical stretching vibration of the NH2
3072=C=CH2C-H stretching: sometimes obscured by the much stronger bands of C-H groups which occur below 3000cm-1
3026=C-HDue to =C-H in the region
2900-CO-CH3Often very weak appears within the region of 3100-2900cm-1
1696=CO stretching vibration (v(C=C)Attributed to the carbonyl functional group.
1600Aromatic ringsStronger when the ring is further conjugated.
1362-O-CH3Due to methyl group. The high intensity of these band often dominates this region of spectrum
744Ortho disubstitution on the benzene ringDue to the condensed ring system and for pyridines and the powerful substituents tend to shift the values to higher frequency.
Attached Files
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