Crystal structures of copper(III) dithiocarbamate complexes [Cu(eta(2)-S2CNMe2)(2)][ClO4] and [Cu(eta(2)-S2CNEt2)(2)][FeCl4] with and without anion-cation interactions

Copper(III) dithiocarbamate complexes [Cu(eta(2)-S2CNMe2)(2)][ClO4] and [Cu (eta(2)-S2CNEt2)(2)][FeCl4] have been characterised crystallographically. B oth contain square-planar Cu(III) centres which attain an overall distorted octahedral coordination environment via long-range intermolecular interact ions. In [Cu(eta(2)-S2CNEt2)(2)][FeCl4]. anions and cations do not interact and Cu(III) centres form an infinite chain held together by weak copper-su lfur interactions. In [Cu(eta(2)-S2CNMe2)(2)][ClO4], perchlorate anions int eract weakly with the Cu(III) centre [Cu-O 2.753(3) Angstrom] which attains overall six coordination via a Cu-S interaction with a second copper-dithi ocarbamate-perchlorate unit. (C) 2000 Elsevier Science S.A. All rights rese rved.