The first crystal structure of a one-dimensional chain of linked Ru~(II)=Ru~(II) units

摘要

The one-dimensional polymer [Ru_2(O_2CCF_3)_4(Phz)]_infinity 1 (Phz = phenazine) was synthesized by the reaction of Ru~(II)_2(O_2CCF_3)_4(THF)_2 with phenazine. An X-ray crystallographic analysis revealed that the compound consists of Ru_2(O_2CCF_3)_4 units bridged by phenazine ligands. The Ru-Ru bond distance is 2.3109(10) A and the axial Ru-N distance is 2.425(2) A. Magnetic measurements performed inthe temperature range 1.8-300 K indicate that the S = 1 Ru~(II)_2 units ar weakly antiferromagnetically coupled (zJ = -3.0 cm~(-1)) with a large zero-field splitting (D = 277 cm~(-1))