Syntheses, redox behavior, and magnetic and spectroscopic properties of copper(II)copper(II)copper(II), copper(II)nickel(II)copper(II), and copper(II)palladium(II)copper(II) species. Crystal structure of [L2Cu2Cu(dmg)2Br]ClO4.cntdot.CH3OH (L = 1,4,7-trimethyl-1,4,7-triazacyclononane; dmg = dimethylglyoximato(2-))

A series of homo- and heterotrinuclear complexes Cu II Cu II Cu II , Cu II Ni II Cu II , and Cu II Pd II Cu II containing the dimethylglyoximato dianion as bridging ligands and either 1,4,7-trimethyl-1,4,7-triazacyclononane or N,N,N ' ,N ' -tetramethylethylenediamine as capping ligands have been synthesized and characterized on the basis of IR, electronic, and EPR spectroscopy and variable-temperature magnetic susceptibility measurements. The crystal and molecular structure of the compound [L 2 Cu 2 (dmg) 2 CuBr]-ClO 4 •CH 3 OH has been established by X-ray diffraction. It crystallizes in orthorhombic system, space group Pnam