A thiophenopolyamine Cu(II) complex fixed by atmospheric carbon dioxide: synthesis, structure and properties

A new trinuclear complex, {[Cu(L)](3) (mu 3-CO(3))}(ClO(4))(4) (L = N-(2-thiophenoethyl)-N, N-bis (3-aminopropyl) amine), was synthesized and characterized by single-crystal X-ray analysis. The complex contained three identical mononuclear copper(II) units connected by the mu(3)-carbonate formed from atmospheric carbon dioxide. The electronic and magnetic properties were studied by cyclic voltammetry and the measurement of magnetic susceptibility, respectively. The mu(3)-bridging model revealed weak ferromagnetic coupling of Cu(II), with the J value of -11.28 cm(-1) and the Zeeman splitting g value of 2.06, which were determined by means of magnetic measurements in the 2 -300K range.