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When Do Hydrogen Bonds Form

When hydrogen bonds form

The formation of hydrogen bonds is a problem in chemistry. The chemical bonds of hydrogen bonds are not strong. However, they play an important role in many chemical and biological processes.

When a hydrogen atom is attached to a strong electronegative atom (e.g., fluorine, oxygen, nitrogen), the electron cloud of the hydrogen atom is strongly pulled towards the electronegative atom, causing the hydrogen atom to be exposed and positively charged. At this time, if another atom with solitary electronegativity is also strong, then the hydrogen atom and the atom can form a weak interaction, that is, a hydrogen bond.

For example, in a water molecule, hydrogen is connected to oxygen. Oxygen, the electricity, negative, high, hydrogen atom, the electron cloud, biased, oxygen, hydrogen atom, is partially positive. Adjacent to water particles, oxygen, atoms, with solitary, to electrons, then, with this, hydrogen atoms form hydrogen bonds. This is the main reason for the unique physical properties of water (such as high melting, boiling point, high specific heat, capacity, etc.).

In addition, in ammonia gas system, hydrogen and nitrogen are connected, similarly, when the ammonia molecules are full of the above-mentioned strips, hydrogen bonds can also be formed.

In short, the formation of hydrogen bonds requires hydrogen atoms to be connected with strong, electric, negative, atoms, and there is another solitary pair, electrons, strong, electric, negative, atoms exist, so that the two are in common, and can only be used to promote the birth of hydrogen bonds. The structure and nature of its pair, matter, often have far-reaching consequences Therefore, the impact.