Difference between Butyric Acid and Butenoic Acid

In the chemical industry, alkenoic acid (but dienoic acid methyl ester, chemical formula C4H7O2) and crotonic acid (chemical formula C4H6O2) are two commonly mentioned allylic monomers, which have significant differences in chemical structure and application. This article will analyze the differences in structure, properties, uses and applications in detail to help readers better understand the differences between the two substances and their applications in industry and biology.

1. chemical structure differences

1. Structure of enoic acid Alkenoic acid is a methyl substituted allyl ester compound, its molecular structure is CH2CH2O-CO-OCH3. The presence of the methyl group causes the enoic acid to differ from the crotonic acid in physical properties such as boiling point and density. The presence of the methyl group also imparts greater solubility and chemical stability to the enoic acid.

2. Structure of crotonic acid Crotonic acid is a methyl-free allyl ester with the molecular structure CH2 = CHCH2COO-. Since there is no methyl substitution, the physical properties of crotonic acid are more active and the chemical reaction activity is higher. This structure gives it unique advantages in certain industrial applications.

, 2. physical properties of the difference

1. solubility and stability Due to the methyl group, the solubility of the alkenoic acid is better, and the chemical stability is higher, and it can better withstand a variety of chemical reactions. In contrast, butenoic acid is more active because of its structure, and its chemical stability is slightly worse, but it performs better in some specific reactions.

2. acid strength The acid strength of enoic acid is higher than that of crotonic acid, which is related to the presence of its methyl group. The presence of the methyl group makes the acidic molecules of the enoic acid more stable and better able to participate in the neutralization reaction. Crotonic acid is weakly acidic, but has unique biocompatibility in some cases, such as in biodegradable materials.

3. industrial application differences

1. Industrial production and use Alkenoic acid is mainly used as an industrial raw material and is widely used in the fields of plastics, coatings and biodegradable materials. Its chemical stability makes it an important source of materials for these fields. Butenoic acid is often used as a raw material for the synthesis of emulsions, rubbers and special polymeric materials due to its non-methyl structure. Its reactivity makes it of great value in the field of fine chemical industry.

2. biodegradable materials In the field of biodegradable materials, crotonic acid is widely used in biodegradable plastics and biodegradable fibers because of its methyl-free structure, better biocompatibility and degradation properties. Because of its high chemical stability, it is more used as an industrial material and less directly used in the field of biodegradation.

4. Application Key Differences

1. Selection criteria When choosing which substance to use, it needs to be determined according to the specific application requirements. If a high chemical stability material is required, alkenoic acid is a better choice; and if high biocompatibility and biodegradability are required, crotonic acid is the ideal material.

2. Performance comparison Alkenoic acid has obvious advantages in the application of plastics and coatings, but its application in biodegradable materials is less. Butenoic acid is more prominent in the field of biodegradable materials and fine chemicals.

5. summary

Both enoic acid and crotonic acid are important allylic monomers, but they are significantly different in chemical structure, physical properties and application fields. The choice of which substance needs to be combined with the specific application requirements, weighing its chemical stability, biocompatibility and degradation performance. Understanding these differences can help you make more informed choices in areas such as industrial production and biodegradable materials.