Synthesis, X-Ray Crystal Structures, and Magnetic Properties of Ni4 Complexes of a Macrocyclic Tetranucleating Ligand

Abstract

Replacement of the acetato ligands in the previously reported LNi4(OH)(CH3O•H•OCH3)(CH3CO2)2 (where LH4 is the macrocyclic tetra Schiff base formed by condensation of two molecules of 2, 6-diformyl-4-methylphenol with two molecules of 2, 6-bis(aminomethyl)-4-methylphenol) either by azide or by methoxide gives derivatives which, X-ray studies reveal, contain the intact [LNi4(OH)(CH3O•H•OCH3)]2+ core present in the acetato complex. Crystal data: azido complex, [LNi4(OH)(CH3O•H•OCH3)(N3)2(H2O)2], monoclinic, C2/c (No. 15), a = 24.121 (3) Å b = 12.069 (3) Å c = 14.234 (4) Å β = 101.15 (1)°, Z = 4; methoxo complex, [LNi4(OH)(CH3O•H•OCH3)3]•3.36CH3-OH•0.7H2O, monoclinic, P2l/a (No. 14), a = 13.243..