Infrared spectroscopic analysis of ethyl acetate

There is ethyl acetate now, and its structural characteristics are analyzed in detail by infrared spectroscopy. Infrared spectroscopy can identify the transition of molecular vibrational energy levels, from which molecular structure information can be obtained.

The infrared spectrum of ethyl acetate shows a strong absorption peak at about\ (1735 cm ^ {-1}\), which is the stretching vibration peak of carbonyl\ ((C = O) \). Carbonyl is an important functional group of ethyl acetate, which has significant polarity and a large dipole moment change during vibration, so the absorption peak is strong.

In the range of\ (1240 - 1030 cm ^ {-1}\), there are a series of absorption peaks, which belong to the stretching vibration of the\ (C-O\) bond. The vibration characteristics of the\ (C-O\) bond in the ester group show its unique absorption in this interval, which helps us to confirm the ester group structure.

For\ (2980 - 2850 cm ^ {-1}\), it is the stretching vibration absorption peak of methyl\ ((- CH_ {3}) \) and methylene\ (((- CH_ {2} -) \). The asymmetric stretching vibration of methyl group is about\ (2960 cm ^ {-1}\), the symmetric stretching vibration is about\ (2870 cm ^ {-1}\); the asymmetric stretching vibration of methylene is about\ (2930 cm ^ {-1}\), and the symmetric stretching vibration is about\ (2850 cm ^ {-1}\). These absorption peaks indicate the existence of hydrocarbon structures in the molecule.

In summary, the analysis of ethyl acetate by infrared spectroscopy shows its functional group structure according to the position and intensity of each absorption peak, which provides a solid basis for in-depth understanding of the molecular properties of ethyl acetate.