Your research group has been contracted to conduct an independent forensics analysis for the Contra Costa County Distict Attorney. You are to identify 6 unknown samples related to a crime scene by using infrared analysis. The IR spectra of the six samples are archived for your interpretation: A, B, C, D, E, and F. The unknown compounds are included in the following list of possibilities. You and your partner(s) are the group's IR experts. Identify the compounds and explain the frequencies of the IR peaks which support your assignments. Consult the IR absorbance tables and the IR patterns for aromatic substitutions.
Benzylalcohol |
p-cresol |
p- ethylbenzaldehyde |
o-ethyl aniline |
2,4-dimethyl aniline |
m-ethyl aniline |
3,5-dimethyl aniline |
p-ethyl aniline |
2,4-dimethyl benzaldehyde |
1-phenyl-2-propanone |
o-cresol |
propiophenone |
m-cresol |
anisole |