One-dimensional azido bridge [1-ethyl-2-(phenylazo)imidazole]-manganese(II): Structure of low bridge angle system and magnetism

摘要

The reaction of 1-ethyl-2-(phenylazo)imidazole (PaiEt), NaN3 and Mn(OAc)(2) center dot 4H(2)O at 1:2:1 molar ratio has isolated azido bridge 1-D coordination polymer. In monomeric unit of the complex, MnN6 distorted octahedral coordination is achieved by two EO-N-3, two EE-N-3 and N,N'-chelation of PaiEt. Bridge angle Mn-(EO)N-3-Mn is 98.55(10)degrees. Variable temperature (300-2 K) magnetic measurements determine J values -13.63 +/- 0.10 and 2.31 +/- 0.15 cm(-1) and support antiferromagnetic (EE-N-3) and ferromagnetic (EO-N-3) interaction, respectively. Maximum susceptibility (chi(M) = 0.0251 cm(3) mol(-1)) is observed at 43 K. (c) 2006 Elsevier B.V. All rights reserved.