Structural and mechanistic studies of co-ordination compounds. Part 38. Syntheses and characterization of several quadridentate macrocyclic amine complexes of iridium(III)
Several macrocyclic amine complexes of the type cis-[IrL3(A)X]+[L3= 1,4,8,11-tetra-azacyclotetradecane, (A)X = Cl2, Br2, or (Cl)Br], trans-[IrLX2]+[L = L3, X = Cl or NO2; L4(1,4,8,1 2-tetra-azacyclopentadecane) or L5(C-meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane), X = Cl or Br; and L6(C-rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, X = Cl], and trans-[IrL(Cl)Br]+(L = L4 or L5) have been prepared and characterized. All these complexes are diamagnetic monomeric species. The i.r. and electronic absorption spectra of the complexes are discussed.