A cyanido-bridged two-dimensional network based on a RuIII schiff base complex and MnII ions: Synthesis, crystal structure and magnetic properties

摘要

The reaction between (Bu_4N)[Ru(salen)(CN)_2] and MnCl_2 yielded a bidimensional (2D) network [{Ru(salen)(CN)_2}_2Mn(CH_3CN)]·H_2O (1) incorporating square pyramidal Mn~(II) centers. The single crystal X-ray structure, heat capacity and magnetic properties of 1 are herein reported. From the magnetic measurements, antiferromagnetic interactions were detected between Ru~)(III) (s = 1/2) and Mn~(II) (S = 5/2) ions through the cyanido bridges (J) in the 2D framework as well as antiferromagnetic interplane interactions (J'). These interactions were estimated using a three-dimensional model in the frame of the mean field approximation (J/kB = -0.86(2) K and J'/kB = -0.067(6) K, gRu = 2.33(5)). Furthermore, a three dimensional antiferromagnetic order was evidenced by dc susceptibility measurements with a Néel temperature of 2.6 ± 0.1 K that was also confirmed by heat capacity measurements.