Shanxian Chemical
SUPPLEMENTS
Hydrogen Bonding Key Concepts
The essence of hydrogen bonding
Between heaven and earth, everything has its own reason, and the beauty of chemistry, hydrogen bonding is particularly critical.
The essence of hydrogen bonding
Hydrogen bonding is not strongly similar to covalent bonding, but has far-reaching effects on many material properties. It is a special force between molecules. After the hydrogen atom covalently binds with atoms with large electronegativity and small radius (such as fluorine, oxygen, nitrogen, etc.), the hydrogen atom becomes positively charged due to electron cloud migration, and then attracts another atom with large electronegativity. This attraction is the force of hydrogen bonding. For example, in water, hydrogen is connected to oxygen in water molecules, and hydrogen bonds can be formed between hydrogen in one water molecule and oxygen in other water molecules, making its boiling point higher than that of homologous hydrides. This is a clear example of the influence of hydrogen bonds on the physical properties of substances.
Characteristics of hydrogen bonds
Hydrogen bonds are directional and saturated. Directional, the hydrogen atoms are arranged in a straight line or close to a straight line with the donor and receptor atoms, which can make the system have the lowest energy. Saturation refers to the fact that hydrogen atoms can only form hydrogen bonds with one receptor atom, which is limited by its electron cloud distribution. These two characteristics are of great significance in determining the structure and properties of substances.
The effect of hydrogen bonds
In the biological world, the effect of hydrogen bonds is extraordinary. The secondary structure of proteins, such as alpha-helix and beta-fold, depends on hydrogen bonds to maintain stability. In the DNA double helix structure, base pairs are also connected by hydrogen bonds to ensure the accurate transmission of genetic information. In the crystal structure, hydrogen bonds affect the stacking mode and stability of crystals. In materials science, hydrogen bonds can regulate the self-assembly process of materials and prepare special functional materials.
From this perspective, hydrogen bonds affect the whole body in the microscopic world, controlling the mysteries of many material changes, and are the core of research in many fields such as chemistry, biology, and materials.
Between heaven and earth, everything has its own reason, and the beauty of chemistry, hydrogen bonding is particularly critical.
The essence of hydrogen bonding
Hydrogen bonding is not strongly similar to covalent bonding, but has far-reaching effects on many material properties. It is a special force between molecules. After the hydrogen atom covalently binds with atoms with large electronegativity and small radius (such as fluorine, oxygen, nitrogen, etc.), the hydrogen atom becomes positively charged due to electron cloud migration, and then attracts another atom with large electronegativity. This attraction is the force of hydrogen bonding. For example, in water, hydrogen is connected to oxygen in water molecules, and hydrogen bonds can be formed between hydrogen in one water molecule and oxygen in other water molecules, making its boiling point higher than that of homologous hydrides. This is a clear example of the influence of hydrogen bonds on the physical properties of substances.
Characteristics of hydrogen bonds
Hydrogen bonds are directional and saturated. Directional, the hydrogen atoms are arranged in a straight line or close to a straight line with the donor and receptor atoms, which can make the system have the lowest energy. Saturation refers to the fact that hydrogen atoms can only form hydrogen bonds with one receptor atom, which is limited by its electron cloud distribution. These two characteristics are of great significance in determining the structure and properties of substances.
The effect of hydrogen bonds
In the biological world, the effect of hydrogen bonds is extraordinary. The secondary structure of proteins, such as alpha-helix and beta-fold, depends on hydrogen bonds to maintain stability. In the DNA double helix structure, base pairs are also connected by hydrogen bonds to ensure the accurate transmission of genetic information. In the crystal structure, hydrogen bonds affect the stacking mode and stability of crystals. In materials science, hydrogen bonds can regulate the self-assembly process of materials and prepare special functional materials.
From this perspective, hydrogen bonds affect the whole body in the microscopic world, controlling the mysteries of many material changes, and are the core of research in many fields such as chemistry, biology, and materials.
Scan to WhatsApp
