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IR spectra of SST polymorphs question:

Analyze the IR spectra and list the functional groups present. Also note if any contaminates are present in the spectra.

Analyst Date PerkinElmer Spectrum Expru Versin 10001 1/28/2019 1002 AM Monday, January 28,2019 1002 AM 89- 80- 70 3333 35cm1
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Answer #1

Below functional groups are present:

  1. In range 2953.84, 2853.91 and 2923.37 cm-1 CH3, CH2 & CH 2 or 3 bands are present having range between 2850-3000 (str).
  2. In range 1350-1470, CH2 & CH3 deformation is present (Bend).

According the IR spectra here, alkane chain is present as the main compound.

According to the given spectra there might be some impurities are present because there is one sharp peak observed at 455.55 cm-1 but according to the normal IR range, it starts from 500 cm-1 onwards.

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