Cl2O is a reddish gas that, at subzero temperatures, is a dark brown
liquid.
反応性
Dichlorine monoxide, Cl2O, is one of the “chlorineoxide”
creators of the oxy-chlorine acids. It is a brownish
yellow gas at room temperature that can explode at high
concentrations when heated or subjected to sparks. It is
best prepared by treating fresh yellow mercuric oxide
with Cl2 gas:
2Cl2＋2HgO→HgCl2·HgO＋Cl2O
It can also be prepared by reaction of Cl2 gas with
moist sodium carbonate, Na2CO3. Dichlorine monoxide
is very water soluble. It is the anhydride of hypochlorous
acid. Much of the Cl2O manufactured industrially is used
to make hypochlorites. It is also the unstable decomposition
product of calcium hypochlorite.
