I need number 3. Parts a and b answered Lab Day Time_ Lab Partner 3. Interpret t
ID: 564125 • Letter: I
Question
I need number 3. Parts a and b answered Lab Day Time_ Lab Partner 3. Interpret the IR spectra of your products and indicate whether they are consistent with the structures expected. Cite specific peaks from your spectra and indicate what specific types of vibrations (e.g, sp C-H stretch, etc.) result in these peaks. Identify any impurities apparent by A. 2-Chlorobenzoic acid B. 2-Chlorobenzyl alcohol 4. What do the melting points you measured indicate about the purity of the products you obtained? A. 2-Chlorobenzoic acid B. 2-Chlorobenzyl alcoholExplanation / Answer
Provided IR Spectra for both the compounds are matching with the structures of the compound. But as signal to noise ratio is not good that's why we can only interpret whether the compound has been formed or not. Both the compounds need to be purify further to get some decent Spectra. Now come to compounds one by one :
2-chlorobenzoic acid
Compound is formed as C-H frequency is appearing at 2900 cm-1 around. Normally this frequency is weak so noise should be low to observe this peak. Intense peak of CO is appearing at around 1600 cm-1 which confirms carboxylic group. Again in aromatic rings intense peak below 950 cm-1 appears which is present in this Spectra.
2-chlorobenzylalcohol
This compound is also formed but need to be record at higher scan rate and further purification. Here C-H peak can be seen at around 2900 along with OH peak at 3200 cm-1 which confirms OH group present in the compound. Also there are no other peaks in 1500-3500 cm-1 region ( except noise which can be eliminated by high scan rate and purification). In fingerprint region ( below 1500cm-1) peaks are present which correspondence to aromatic region.
Hence both the compounds are formed but need further purification. All the best !