MAGNETO STRUCTURAL CORRELATIONS AND ESR-SPECTRA OF DINUCLEAR COPPER(II) COMPLEXES OF THIOPHENOPHANE LIGANDS CONTAINING THIOETHER DONOR ATOMS

Magnetic susceptibility data on powdered samples of the dinuclear complexes (CuCl2•L1)2 and (CuCl2• L2)2 (L1 = 2,5,8-trithia[9](2,5)thiophenophane; L2 = 2,5,9,12-tetrathia[13](2,5)thiophenophane) have been collected in the temperature range 5-297 K. The data have been fitted to the Friedberg magnetization expression containing a molecular field correction, and from the fit, values for intradimer exchange, −2J [7.4 (3) cm−1, (CuCl2•L1)2; 20.8 (1) cm−1, (CuCl2•L2)2], interdimer exchange, J′ [−0.9 (1) cm−1, (CuCl2•L1)2; −0.3 (3) cm−1, (CuCl2•L2)2], and g [2.066 (9), (CuCl2•L1)2; 2.08 (1), (CuCl2•L2)2] have been obtained. ESR spectra yield values for and g⊥ that give average g values for (CuCl2•L1)2 and (CuCl2•L2)2 of 2.077 and 2.084, respectively. The experimental results are correlated with structural details of the complexes. © 1990, American Chemical Society. All rights reserved.