Melting range 217-222 C Unknown solids -must report melting point along with lit
ID: 579921 • Letter: M
Question
Melting range 217-222 C Unknown solids -must report melting point along with literature values. 1) 2) IR, NMR and MS data - must report reference for IR and NMR (page number and spectrum letter if appropriate) 3) IR spectra must have pertinent absorptions indicated 4) 'H and 13C NMR spectra - equivalent sets of hydrogens and carbons, respectively. must be indicated on the spectra. 5) You should write a concise story of how the spectrum and physical properties aided you in you unknown determination. Remember you can correctly identify your unknown, but lose many points for poor use of spectral data. For example, to not identity a peak around 3500-3300 in, say, an unknown alcohol is unforgivable.Explanation / Answer
Poton and 13C NMR show peak above 7 ppm and 120 ppm respectively therefore compound is polycyclic aromatic compound
IR does not have band above 3000 therefore the compound does not have hydroxy, amine or aldehyde group and IR does not have peak between 1650 to 1750 cm-1 show the compound does not have carbonyl group
Since the molecular ion peak and base peak at 178 m/z
The structure of the compound must be anthracene
In anthracene hydrogen at 9 and 10 position will give singlet in proton NMR
It has melting point of 217 deg celusius
Therefore the structure of the compound is ANTHRACENE