Syntheses, Crystal Structures, and Properties of Four Two‐Dimensional Network Complexes with Multidentate Bis(Schiff Base) Ligands

Abstract

Abstract Four novel two‐dimensional coordination polymers [Ag 2 (L1) 2 ](CF 3 SO 3 ) 2 ·H 2 O ( 1 ), [Ag 3 (L1) 2 ](NO 3 ) 3 ·H 2 O ( 2 ), [Co(L1) 2 (SCN) 2 ]·EtOH ( 3 ), and [Co(L2) 2 (SCN) 2 ] ( 4 ) were obtained by reactions of the bis(Schiff base) ligand 1,2‐bis(4′‐pyridylmethyleneamino)ethane (L1) with silver( I ) trifluoromethanesulfonate, silver( I ) nitrate, and cobalt( II ) thiocyanate, and 1,2‐bis(3′‐pyridylmethyleneamino)ethane (L2) with cobalt( II ) thiocyanate, respectively. In complex 1 , a 2D network structure was achieved by hydrogen bonding interactions between the two 1D chains, consisting of double‐stranded helicates, through solvate water molecules. The 2D network of complex 2 was formed by the coordination to a two‐coordinate silver( I ) ion instead of hydrogen bonds as in complex 1 . Complex 3 contains molecular square units, which are occupied by disordered ethanol molecules. Complex 4 exhibits a classic square‐grid network which is different from that of 3 due to the different terminal pyridyl groups in L1 (4‐pyridyl) and L2 (3‐pyridyl). These coordination polymers were characterized by X‐ray crystallography, electrospray mass spectrometry, cyclic voltammetry and magnetic measurements. The results show a 2D network superstructural diversity by the fine‐tuning of construction components. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)