30723-65-0Relevant academic research and scientific papers
Magnetic properties and crystal structure of a one-dimensional phase of tetrakis(μ2-benzoato-O,O′)-bis(dimethyl sulfoxide)dicopper(II)
Reyes-Ortega, Yasmi,Alcantara-Flores, Jose L.,Hernandez-Galindo, Maria C.,Ramirez-Rosales, Daniel,Bernes, Sylvain,Ramirez-Garcia, Juan C.,Zamorano-Ulloa, Rafael,Escudero, Roberto
, p. 16312 - 16317 (2005)
A new crystalline polymorphic phase of tetrakis(μ2-benzoato- O,O′)-bis(dimethyl sulfoxide)dicopper(II) was obtained by direct synthesis, in space group P21/n. The copper coordination is in a slightly distorted square pyramidal geometry with an intramolecular Cu...Cu distance of 2.6494(8) A. The Cu-O distances of the two copper in a dimer are different, giving different chemical environments for each Cu ion. The crystal structure is built up of well-separated stacking columns oriented along the b-axis, with units uniformly spaced, producing a one-dimensional (1-D) zigzag chain through Cu(II)-S...S-Cu(II) interdimer interactions [S...S separation: 3.975(2) A]. Magnetization measurements in the range 2-300 K indicate two magnetic orderings, at low temperature (T a weak ferromagnetic ordering is observed, and above this temperature an antiferromagnetic behavior takes place. ESR spectra at 300 and 77 K of a polycrystalline sample show the characteristic signal of zero-field with D = 0.354 cm-1, consistent with a ferromagnetic Cu...Cu exchange interaction at low temperature.
