Determine the class of the compound, which contains only carbon and hydrogen, an

Question

Determine the class of the compound, which contains only carbon and hydrogen, and exhibits the infrared spectrum below. Possible compound classes are alkane, alkene, alkyne, aromatic, alcohol, amine, aldehyde ketone, carboxylic acid, acid chloride, ester, amide The compound is a(n) (Use your cursor to read the IR frequency scale. Flash Installation and Troubleshooting Infrared spectra provided courtesy of Thermo Electron Corp. 110% Wavenumber: 0% LL 4000 3500 3000 2500 2000 1500 1000 450 Wavenumber (cm-1)

Explanation / Answer

Q1) The IR spectrum is of an aromatic hydrocarbon. The peaks at 1500 and around 1400 are characterstic of aromatic double bonds and the peaks about 2900 - 3100 are the characteritic C-H stretch peaks.

Q2) Asthe molecularion has even molar mass, the molecule contains even number of nitrogen atoms. Thus it can be C4H10N2O [48.000+10.08 + 28.006 +15.995 =102.081]

Q3) Since the molecular ion occurs at a odd number number mass,it has only one nitrogenand the molecular formula can be C3H7NO [ 36.000 + 7.056 + 14.003 +15.995 =73.054]

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