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Table 3 Frequencies (cm− 1) and assignments for the characteristic bands in the FT-IR spectra of DDQ, SEL, and their CTC complex

From: Spectrophotometric and computational characterization of charge transfer complex of selumetinib with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and its utilization in developing an innovative green and high throughput microwell assay for analysis of bulk form and pharmaceutical formulation

DDQ

SEL

CTC

Assignment

 

3365

3301

3193

3139–3500 s, br

O-H stretching

N-H stretching

2229

 

2211

C≡N stretching

1666

 

1634

C = O stretching

 

1629

1694

C = O amide stretching

 

1585

1554

N-H bending

1543

 

1554

C = C stretching

 

1491

1493

C = C aromatic stretching

838

 

813

C-Cl stretching