Infrared spectroscopic analysis of ethyl cinnamate

Ethyl cinnamate, as an important organic compound, its infrared spectroscopic analysis is crucial to determine its structure and purity.

In the infrared spectrum, different chemical bond vibrations produce absorption peaks in specific wavenumber regions. For ethyl cinnamate, first of all, the unsaturated\ (C-H\) stretching vibration absorption peak can be observed near 3000-3100\ (cm ^ {-1}\), which indicates the existence of\ (C-H\) bonds of benzene ring and alkenyl group in the molecule. The absorption peak in this region is sharp and characterized, which is an important basis for judging the existence of unsaturated\ (C-H\).

At 1700-1750\ (cm ^ {-1}\), there is a strong and sharp absorption peak, which belongs to the stretching vibration of\ (C = O\) in the ester group. The intensity and position of this absorption peak reflect the characteristics of the ester group, and its strong absorption is due to the high polarity of the\ (C = O\) double bond. The skeletal vibration absorption peaks of the

benzene ring usually appear in the 1450-1600\ (cm ^ {-1}\) region, showing multiple absorption peaks. The combined characteristics of these absorption peaks help to further confirm the existence of the benzene ring and its substitution mode.

The absorption peak at 960-980\ (cm ^ {-1}\) corresponds to the\ (C-H\) out-of-plane bending vibration of the trans-olefin, which is an important indicator for determining the configuration of the olefin in ethyl cinnamate. By accurately identifying and analyzing the absorption peaks of ethyl cinnamate in the infrared spectrum, the molecular structure information can be deeply understood, providing a solid data basis for relevant chemical research and practical applications, such as in organic synthesis for product structure confirmation, in quality control for judging product purity, etc.