Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Apple1977 on April 29, 2021, 12:21:02 PM
-
Can somebody identify the following peaks please in the IR Spectrum .. can you give a full explanation for each peak please ie C-H bend, Alkene etc …thank you
1068.2
1231.2
1367.1
1452
1733
2241.84
2921.11
-
I have them down as
OH Group
C-O stretch ether
S=O stretch sulfonamide
C-H. Bend Alkene methyl group
S=O. Stretch aldehyde
C (triple bond) N. Stretch nitrile
C-H stretch Alkene
Can anyone put me right please
-
Not just the frequency but the depth (and occasionally the width) of the signal is extremely helpful in making assignments. If an -OH group is present, what other signals would you see?
-
thanks for the info I already know ..lol. the question was can anyone identify the correct assignments ?
I know about stretches and a-symmetric stretches etc etc ...dipole to dipole moment's strong weak and medium peaks . all I would like is a professional second eye to look on the peak assignments and report back . thank you :D
dare I ask can anyone calculate this ??? I don't know where to start which is why there's no attempt
Water pH Titration Results
Exact concentration of NaOH solution: 0.100136 M
Volume of NaOH solution used in 1st titration: 22.4 mL
Volume of NaOH solution used in 2nd titration: 24.4 mL
-
If I were to assign a signal as C-O, what should I look for next?
I don't know what you mean by S=O aldehyde. Is that a typo?
More generally, I would say that any one stretch frequency might be associated with one or possibly more than one functional group, depending on the particulars.
-
Water pH Titration Results
Exact concentration of NaOH solution: 0.100136 M
Volume of NaOH solution used in 1st titration: 22.4 mL
Volume of NaOH solution used in 2nd titration: 24.4 mL
Huh?
-
Sorry guys I’m Forensic’s so maybe these are not familiar areas of expertise for you
-
IR spectra of a compound doesn't depend on the application. There is often no easy and unique peak assignment, IR can be quite messy.
-
I recently started teaching forensic chemistry, and IR is one of the topics, as well as being part of the organic chemistry curriculum that I have taught for some time. It seems to me that you approaching this problem with the wrong tactic. You should be working toward finding a single structure that is compatible with all of the available evidence. That is why I was prodding you about C-O and O-H groups.
With respect to your titration results, I don't understand the context of the question. Once you fill that in, Borek should be able to guide you.