Magnetic properties of two 1D complexes with mixed bridging ligands

Abstract

The crystal structure of a 1D chain complex, [Cu(SCN)(deae)] n ( 1) (Hdeae= N, N-diethylamino ethanol), with mixed bridges was determined. The structure is composed of a dimeric Cu(II) unit with two bridging μ 3-η 2-aminoethanolato ligands, while the units are bridged by end-to-end thiocyanato groups to form a 1D chain. The variable temperature magnetic susceptibility of 1 and [Cu(SCN)(dmae)] n ( 2) (Hdmae= N, N-dimethylamino ethanol) in the temperature 5–300 K have been interpreted in terms of simple dimer model approximation ( H=−2 JS A· S B). The magnetic behaviors show that the aminoethanolato bridges mediate a moderately strong antiferromagnetic exchange interaction with the fitting values g=1.96(3), J=−175(3) cm −1 for 1 and g=2.016(7), J=−205.4(7) cm −1 for 2, respectively.