Correlation Analysis of Infrared Spectrum Peaks of Ethyl Acetate
The mystery of IR Spectrum Peaks of Ethyl Acetate requires detailed investigation of the relationship between its molecular structure and vibration mode.

Ethyl acetate, its molecular structure has unique characteristics. Contains functional groups such as carbonyl (C = O) and ester group (-COO-). The stretching vibration of carbonyl groups presents a significant peak in the infrared spectrum. This peak is usually located in the region of about 1735-1750 cm. Because the carbon-oxygen double bond in the carbonyl group has a high bond energy, it absorbs infrared radiation of a specific frequency during vibration, resulting in its peak in this range. This peak is an important basis for determining the carbonyl content in the molecule.

The stretching vibration of the C-O bond in the ester group also forms a unique peak. The vibration peaks are mostly in the range of 1000-1300 cm. The chemical environment of different C-O bonds is different, and the position and strength of the peaks are also different. For example, the C-O bond connected to the carbonyl group may have a specific frequency, which can help to identify the ester structure.

Furthermore, the C-H stretching vibration of methyl (-CH <) and methylene (-CH < -) in the molecule also leaves marks in the infrared spectrum. The C-H stretching vibration peak of methyl group is about 2960-2870 cm. The C-H stretching vibration peak of methylene group is about 2930-2850 cm. By analyzing the location, intensity and peak shape of such peaks, the number and connection mode of methyl group and methylene group in the molecule can be understood.

From this perspective, the infrared spectrum peak of ethyl acetate is like a unique fingerprint of molecular structure. With the fine analysis of each peak, chemists can accurately analyze its molecular structure, which is of crucial significance in the fields of organic chemistry research and compound identification.