Iodine and this ligand are complexed with iridium to catalyze the production of acetic acid from methanol in the Cativa process. Due to pi-backbonding, this ligand has the largest crystal-field splitting parameter in the spectrochemical series. This compound and hydrogen form water gas, and it is the primary reducing agent in blast furnaces. Though it is not (-5[1])produced during complete combustion, incomplete (10[1])combustion produces this compound. (10[3])This compound binds 200 times more strongly (-5[1])to hemoglobin than (10[1])oxygen, (10[1])so low concentrations can lead to poisoning. For 10 points, name this odorless and colorless gas with formula (10[1])CO. ■END■ (10[1])