This Entry
PermalinkURI
URI Label
Revisions
Add to List
Edit Entry
Export:
XML
Archives
- May 2012 (1)
- April 2012 (15)
- March 2012 (29)
Sections
- Analytical Procedures (8)
- Condensation Products (5)
- Experimental Procedure (1)
- Spectroscopic Data (31)
Substituent
Spectroscopic Method
Tools
Show/Hide
QR
CodeShow/Hide Keys
Spectroscopic Method: MS-ESI
Substituent: Methoxy
MS Spectrum of (3E)-3-(4-Methoxybenzylidene)-1,3-dihydro-2H-indol-2-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:
Substituent: Methoxy
MS Spectrum of (3E)-3-(4-Methoxybenzylidene)-1,3-dihydro-2H-indol-2-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 Position | Diff. between molecular mass and peak | Suspected molecules or ions | Inference |
| 252.2 | 252 – 251 = 1 | (M+H)+ | Compound gains a proton. |
| 293.2 | 293 - 251 = 42 | (M+H+Na+H2O)+ Na(23), H2O (18) | Sodium & H+ ions and water molecule attach to the compound. |
| 315.2 | 315-251=64 | (M+HCOOH+H2O)+ | Molecular ion gains formic acid and water molecule. |