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6th May 2012 @ 18:16
Spectroscopic Method: MS-ESI
Substituent: Nitro
MS Spectrum of (3E)-3-(4-Nitrobenzylidene)-1,3-dihydro-2H-indol-2-one:

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



The mass spectrum of (3E)-3-(4-Nitrobenzylidene)-1,3-dihydro-2H-indol-2-one has been obtained by negative electrospray ionization (ESI). The peak at m/e = 265.2 confirms the molecular mass of this compound as the molecular ion gains a proton.

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

Peak PositionDiff. between molecular mass and peakSuspected molecules or ionsInference
265.2265 - 264 = 1(M+H)+Parent compound plus a proton
Attached Files
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
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 @ 17:40
Spectroscopic Method: MS-ESI
Substituent: Chloro
MS Spectrum of (3E)-3-(4-Chlorobenzylidene)-1,3-dihydro-2H-indol-2-one:

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


The mass spectrum of (3E)-3-(4-Chlorobenzylidene)-1,3-dihydro-2H-indol-2-one has been obtained by positive electrospray ionization (ESI). The peak at m/e =256.2 confirms the molecular mass of this compound as the molecular ion gains a proton.

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

Peak PositionDiff. between molecular mass and peakSuspected molecules or ionsInference
258.2258-255=3(M+H)+ H(1)Molecular ion gains a proton, 37Cl isotope present.
259.2259-255=4(M+He)+ He(4)Compound gains helium atom
288.2288-255=33(M+MeOH)+ MeOH(32)Molecular ion gains methanol, 13C isotope present.
290.2290-255=35(M+H2O+NH3)+ H2O(18), NH3(17)Molecular ion gains water and ammonia molecules
299.2299-255=44(M+CO2)+ CO2(44)Compound gains carbon (IV) oxide molecule.
297.2297-255=42(M+Na+H2O)+ Na(23), H2O(18)Molecular ion gains water and sodium atom
273.2273-255=18(M+H2O)+Compound gains water
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