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6th May 2012 @ 18:08
Spectroscopic Method: MS-ESI
Substituent: Methoxy
MS Spectrum of (3E)-3-(4-Methoxybenzylidene)-1,3-dihydro-2H-indol-2-one:

MS Spectrum of 3-(3-Methoxyphenyl) 1, 3-Dihydroindol-2H-one


The mass spectrum of (3E)-3-(4-Methoxybenzylidene)-1,3-dihydro-2H-indol-2-one has been obtained by positive electrospray ionization (ESI). The peak at m/e = 252.2 confirms the molecular mass of this compound as the molecular ion gains a proton.

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

Peak PositionDiff. between molecular mass and peakSuspected molecules or ionsInference
252.2252 – 251 = 1(M+H)+Compound gains a proton.
293.2293 - 251 = 42(M+H+Na+H2O)+ Na(23), H2O (18)Sodium & H+ ions and water molecule attach to the compound.
315.2315-251=64(M+HCOOH+H2O)+Molecular ion gains formic acid and water molecule.
Attached Files
MS Spectrum of 3-(3-Methoxyphenyl) 1, 3-Dihydroindol-2H-one