The reaction of copper (II) 8-quinolinol complexes with gaseous hydrogen halides

Abstract

α-Cu(qn) 2, β-Cu(qn) 2, CuqnCl and CuqnBr, where qn represents the 8-quinolinol (8-hydroxyquinoline) anion, were reacted with dry and wet HCl gas and dry HBr gas at room temperature. At room temperature each complex adds 2 moles of HX per 8-quinolinol anion. The complexes and Cu(qn) 2·4HCl were reacted with HCl gas at −78°, where each complex adds 4 moles of HCl per mole of anion. The addition at room temperature is irreversible; however, at −78° the addition of 2 moles of HCl is reversible. The dissociation pressures of the low-temperature addition compounds were measured at several temperatures and the heat dissociation is ca. 7·0 kcal/mole for the adducts.