Answer to Question #167581 in General Chemistry for AALIYAH F JOHNSON

Question

How does the IR Spectra Library Search work?

Answer 1

IR databases include a lot of structures of organic compounds and their IR spectra of known and widespread substances. The initial data for the analysis are either a spectral curve or a list of positions and intensities of absorption bands. Usually, along with viewing structural formulas, it is possible to view and analyze their fragmentary composition. Some programs provide high-performance searches based on proprietary algorithms and searches based on four parameters (spectrum, band position, text, and combined search).

In addition, I can suggest that if this is a program for processing IR spectra, then the spectrum is processed, the value in inverse centimeters is compared, and then a structure is assembled from the found characteristic groups (such as CO, CH, COOH, etc.). And if this is a program with standard spectra of different substances, then the peaks of the spectrum are simply compared with the standard library of spectra.