CrO2Cl2 is the correct formula of chromyl chloride. It is tetrahedral similar to the most commonly encountered chromium(VI) derivative chromate, CrO2−4.
CrO2Cl2is a neutral molecular species. This means that in the liquid and solid forms, the individual CrO2Cl2entities interact predominantly via Vander waals bonding. Such weak bonding leads to low melting and boiling points, which is related to the fact that it is a distillable liquid.
Hence, the correct answer is 1.