At room temperature, #CO_2# is a gas and #CS_2# is a liquid. Why is this reasonable?
Because carbon disulfide has MANY more electrons than carbon dioxide....and besides, God wanted it that way....
And as chemists, as physical scientists, let's have some data. Carbon dioxide sublimes at
Carbon disulfide has a larger, more polarizable electron cloud that makes for effective dispersion forces between molecules, and hence an elevated boiling point. The stuff still pen and inks abominably, and it is a VERY serious fire hazard in a laboratory...