Novel Complexes of Ligands Containing Phenol and Alcohol Groups: From Polynuclear Cluster, 1D Coordination Polymer to 2D Supramolecular Assemblies

Abstract

Abstract A series of Co II , Cu II , Zn II , Ag I and mixed‐valence cobalt complexes 1 − 9 with tridentate and tetradentate chelating ligands containing oxygen‐bridging and hydrogen‐bonding groups have been synthesized, four of which have been structurally characterized: [Co 6 L 1 6 (OH)(H 2 O) 3 ]Cl 2 ·10H 2 O ( 1 ) [H 2 L 1 = N ‐(2‐hydroxybenzyl)ethanolamine] is a hexanuclear Co III 3 Co II 3 complex, with a core of quadruple face‐sharing defective cubane‐like units; [CuNaL 2 (ClO 4 )] ∞ ( 3 ) [H 2 L 2 = N , N ′‐bis(2‐hyroxybenzyl)ethylenediamine] is a μ 3 ‐phenoxo‐ and μ 4 ‐perchlorato‐bridged 1D heterometallic Cu II Na I coordination polymer; the coordination moieties of [CuL 3 ] 4 ·4H 2 O ( 6 ) [H 2 L 3 = N , N ′‐bis(2‐hyroxy‐5‐methylbenzyl)ethylenediamine] form a 2D hydrogen‐bonded network structure of monophenoxo‐bridged dimeric moieties; and the molecules of [Ag(H 2 L 2 )(HL 2 )] ( 9 ) are connected to give an undulated 2D structure, consisting of hydrogen‐bonded hexagonal units. The variety of these structures is discussed on the basis of the stereoelectronic preferences of the metal atoms, hydrogen bonds, disposition of the bridging groups, steric effect, and conformational flexibility of the ligands. Variable‐temperature magnetic properties of 1 and 6 are also reported. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)