Complexes of ligands providing endogenous bridges. Part 3. Non-transition metal complexes of macrocycles derived from 2,6-diacetyl-4-methylphenol; the crystal structure of a mononuclear barium complex

Abstract

The synthesis of macrocyclic complexes derived from the condensation of 2,6-diacetyl-4- methylphenol and 1,n-alkanediamines in the presence of non-transition-metal templating agents is discussed. The crystal structure of a mononuclear barium perchlorate complex of the macrocycle derived from 1,3-diamino-2-propanol and the phenol is reported. The ligand is folded such that the aromatic rings are parallel to each other and the barium sits on top of the donor-atom ring. The crystals are orthorhombic, space group Fdd2 (C¹⁹_2v, no. 43), with a= 37.252(28), b= 7.643(4), c= 22.631(22)Å, and Z= 8; 1 134 independent reflections with I/σ(I) > 3.0 gave R= 0.0350.