Solvothermal synthesis, crystal structure and magnetic behavior of a Schiff base heterometallic cluster

The reaction of Ni(ClO4)2·6H2O with a dilithium 2-[(2-hydroxy-3-ethoxy-enzylidene)-amino]-ethane sulfonic acid (Li2L) in a acetonitrile solution under solvothermal conditions leads to the formation of heterometallic tetranuclear cubane cluster [Ni3Li(L)3(OH)(CH3CN)3]·0.5CH3CN (1, where Li2L = dilithium 2-[(2-hydroxy-3-ethoxy-benzylidene)-amino]-ethanesulfonate). Complex 1 displays dominant ferromagnetic interactions through μ3-O (oxidophenyl and hydroxyl) binding modes.

► [Ni3Li(L)3(OH)(CH3CN)3]·0.5CH3CN (1) was characterized by IR spectroscopy, elemental analysis and X-ray crystallography.
► The most interesting is that K, Na or Li and 2-[(2-hydroxy-3-alkoxy-enzylidene)-amino]-ethane sulfonic acid may be recognized each other.
► The magnetic measurements reveals that the complex 1 shows ferromagnetic interaction through μ3-O binding modes.