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27th March 2012 @ 12:35
Substituent: Methoxy;Methyl;Nitro;Chloro;Bromo
Spectroscopic Method: PXRD
PXRD Diffraction Peaks of Five 4-Substituted Methylidene oxindoles

XPRD Diffraction peaks
Attached Files
27th March 2012 @ 12:31
Spectroscopic Method: MS-ESI
Substituent: Methyl
MS Spectrum of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one:

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


The mass spectrum of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one has been obtained by positive electrospray ionization (ESI). The peak at m/e = 236.3 confirms the molecular mass of this compound as the molecular ion gains a proton.

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

Peak PositionDiff. between molecular mass and peakSuspected molecules or ionsInference
236.3236 – 235 = 1(M+H)+Molecular ion gains a proton, 13C isotope present.
471.5471 – 235 = 236(2M+H)+Two molecules of the compound gain a proton.
Attached Files
27th March 2012 @ 12:25
Spectroscopic Method: HPLC
Substituent: Methyl
HPLC Chromatogram of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one:

HPLC Chromatogram of (3E)-3-(4-Methylbenzylidene)-1,3-dihydro-2H-indol-2-one


The sharp peak at 6.298 retention time confirms the presence of single isomer in this compound while the peaks at retention times 3.595 and 4.158 are due to the presence of impurities. The percentage yield of this compound is 68.40% against the calculate value of 69.5%
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
27th March 2012 @ 12:03
Spectroscopic Method: DSC
Substituent: Nitro
DSC Thermogram of (3E)-3-(4-Nitrobenzylidene)-1,3-dihydro-2H-indol-2-one

DSC Thermogram of (3E)-3-(4-Nitrobenzylidene)-1,3-dihydro-2H-indol-2-one
Attached Files