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

The reaction of 1-ethyl-2-(phenylazo)imidazole (PaiEt), NaN3 and Mn(OAc)2 · 4H2O 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–N3, two EE–N3 and N,N′-chelation of PaiEt. Bridge angle Mn–(EO)N3–Mn is 98.55(10)°. 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–N3) and ferromagnetic (EO–N3) interaction, respectively. Maximum susceptibility (χM = 0.0251 cm3 mol−1) is observed at 43 K.

Graphical abstractAzido bridge 1-D coordination polymeric manganese(II) complex of 1-ethyl-2-(phenylazo)imidazole is described. The MnN6 distorted octahedral shows lowest bridge angle Mn-(EO)N3–Mn, 98.55(10)°. Variable temperature (300–2 K) magnetic measurements determine J values −13.63 ± 0.10 (antiferromagnetic) and 2.31 ± 0.15 cm−1 (ferromagnetic).Figure optionsDownload full-size imageDownload as PowerPoint slide