Complexes of ligands providing endogenous bridges. Part 8. Metal complexes of oxa-azamacrocycles derived from 1,5-diamino-3-pentanol; the X-ray crystal structure of a free macrocyclic ligand

Abstract

A series of oxa-azamacrocycles derived from 1,5-diamino-3-pentanol and acyclic dialdehydes have been prepared by non-template procedures and used to synthesise mononuclear complexes of Co^II, Ni^II, Cu^II, and Zn^II. The crystal structure of the free macrocycle C₂₁H₂₈N₂O₃ is reported. The compound crystallises in the triclinic space group P(C_i, no. 2) with unit-cell dimensions a= 9.028(6), b= 10.207(7), c= 11.314(9)Å, α= 108.52(6), β= 85.51(6), γ= 100.09(6)°, and Z= 2; 922 independent reflections with |F|/σ(|F|) > 6.0 gave R= 0.0473.