Complexes of alkali-metal salts, including those of chelating anions, with four macrocyclic ‘crown’ ethers

Abstract

An investigation of the effect of solvent, presence of water, and ratio of reactants on the isolation of complexes between LiX (X = Br, I, NCS) with benzo-15-crown-5(1) and of NaX and KX with (1), dibenzo-18-crown-6(2), dibenzo-24-crown-8(3), and dibenzo-30-crown-10(4) has led to several new complexes, particularly those with two metal atoms to one ligand. For sodium and potassium with X = 1-nitroso-2-naphtholate, 2-nitrophenolate, 2,4-dinitrophenolate, and 2-hydroxybenzoate, complexes have been made with ligands (1)–(3). These include [(sodium 2-nitrophenolate)₂(3)] and [potassium hydrogen(2-nitrophenolate)₂,(1)₂].