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6th May 2012 @ 17:49
Spectroscopic Method: MS-ESI
Substituent: Bromo
Spectrum of (3E)-3-(4-Bromobenzylidene)-1,3-dihydro-2H-indol-2-one:

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

The mass spectrum of (3E)-3-(4-Bromobenzylidene)-1,3-dihydro-2H-indol-2-one has been obtained by positive electrospray ionization (ESI). The peak at m/e =300.1 confirms the molecular mass of this compound as the molecular ion gains a proton.

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

Peak PositionDiff. between molecular mass and peakSuspected molecules or ionsInference
300.1300-299 = 1(M+H)+Molecular ion gains a proton, 79Br isotope present.
302.1302-299 = 3(M+H)+Molecular ion gains a proton, 81Br isotope present.
332.2332-299 = 33(M+MeOH+H)+Compound gains methanol and proton.
Attached Files
6th May 2012 @ 17:07
Spectroscopic Method: HPLC
Substituent: Bromo
HPLC Chromatogram of (3E)-3-(4-Bromobenzylidene)-1,3-dihydro-2H-indol-2-one:

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

The two sharp peaks at 6.876 and 7.388 retention times confirm the presence of (E)- and (Z)- isomers of (3E)-3-(4-Bromobenzylidene)-1,3-dihydro-2H-indol-2-one while the two speaks at 3.596 and 4.715 retention times are due to impurities. The percentage yields of these two isomers (E) - and (Z) - are 12% and 42% respectively.
Attached Files
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
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 @ 12:00
Spectroscopic Method: DSC
Substituent: Bromo
DSC Thermogram of (3E)-3-(4-Bromobenzylidene)-1,3-dihydro-2H-indol-2-one

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