Structural and mechanistic studies of co-ordination compounds. Part 38. Syntheses and characterization of several quadridentate macrocyclic amine complexes of iridium(III)

Abstract

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.