The polarity of ethyl ester and dichloromethane
The polarity of the husband is related to its behavior and compatibility, and is the gist of both theory and practice. The polarity comparison between ethyl ester (Ethyl Acetate) and dichloromethane (Dichloromethane), special value discussion.

For ethyl ester, its molecular structure contains carbonyl and ethoxy. The carbon-oxygen double bond in the carbonyl group has strong electronegativity, causing the electron cloud to bias towards oxygen, making the carbonyl carbon partially positive; the oxygen in the ethoxy group is also electronegative, leading to electron bias. However, as a whole, the ethyl ester structure is symmetrical and polar, which is limited.

Dichloromethane, tetrahedron of molecular configuration. The electronegativity of chlorine atom is higher than that of carbon and hydrogen, and the electron cloud is biased towards chlorine, resulting in uneven distribution of molecular charges. However, due to the non-complete symmetry of the four substituents, the polarity performance also has its own characteristics.

With the degree of polarity, the polarity of ethyl ester is slightly stronger than that of dichloromethane. The synergistic effect of the carbonyl group and ethoxy group of ethyl ester makes the molecular dipole moment relatively large; although the charge caused by the chlorine atom of dichloromethane is uneven, the structure is relatively compact, and the overall dipole moment is inferior to that of ethyl ester.

This polarity difference is effective in practical applications. Such as liquid-liquid extraction, the different polarities make the two have different extraction forces for different polar solutes. Ethyl ester is better extracted from solutes with slightly higher polarity due to slightly stronger polarity; dichloromethane has better solubility to substances with weaker polarity.

In summary, ethyl ester and dichloromethane have different polarities. In chemical, pharmaceutical, analytical and other fields, it is clear that their polarity is different, and good use can be obtained.