What is Se2Cl4? Important knowledge about Se2Cl4.

1. Definition of Se₂Cl₄

Se₂Cl₄, commonly known by the IUPAC name Diselenium hexachloride, is also referred to as Hexachlorodiselenide in English. It is a compound of selenium and chlorine with the molecular formula of Se₂Cl₄.
The atomic mass of Se₂Cl₄ comprises of 2 selenium atoms with a total mass of 157.92 u and 4 chlorine atoms with a total mass of 141.36 u. Therefore, the molecular mass of Se₂Cl₄ is 299.28 atomic mass unit (u).

2. Properties of Se₂Cl₄:

2.1 Physical properties of Se₂Cl₄:
Se₂Cl₄ is a yellowish solid with a distinctive unpleasant odor. Its pH level has not been clearly determined.

2.2 Chemical properties of Se₂Cl₄:
Se₂Cl₄ is an amphoteric substance, meaning it can react with both acids and bases. It is easily oxidized and can react with water to produce selenium dioxide and hydrochloric acid.

3. Common chemical reactions with Se₂Cl₄
   Due to its amphoteric and easily oxidizable nature, Se₂Cl₄ can participate in various chemical reactions. I will teach about these chemical equations in upcoming lectures.

4. Preparation of Se₂Cl₄

4.1 Laboratory preparation of Se₂Cl₄:
Se₂Cl₄ can be prepared through the reaction between selenium and iron (III) chloride or excess chlorine.

4.2 Industrial preparation of Se₂Cl₄:
In the industry, Se₂Cl₄ is commonly produced by reacting selenium with chlorine at high temperatures.