Synthesis, characterization, and crystal structures of [Cu(ca(2)en)(2)]ClO4, and [CU(ca(2)en)(PPh3)(2)]ClO4 compIexes

摘要

Synthesis, spectroscopy, and crystal structures of [Cu(ca(2)en)(2)]ClO4 (1) and [Cu(ca(2)en)(PPh3)(2)]ClO4 (2) (ca(2)en = NN'-bis(trans-cinnamaldehyde)ethylenediimine) are reported. Compound 1 crystallizes in the orthorhombic space group Pbca, with a = 12.5647(7), b = 21.8203(11), c = 27.992(2) Angstrom, V= 7674.3(7) Angstrom(3), Z= 8. Compound 2 crystallizes in the triclinic space group P (1) over bar, with a 13.0540(11), b = 14.2935(13), c 14.9863(13) Angstrom, alpha = 84.130(2), beta = 69.761(2), gamma = 87.749(2)degrees, V= 2609.8(4) Angstrom(3), Z = 2. The coordination polyhedron about the Cu-I center in the two complexes is best described as a distorted tetrahedron. The H-1-NMR and electronic spectra of these complexes are also reported and discussed. The cyclic voltammetry of the complexes indicate a quasireversible redox behavior for complex 1 (E-1/2 = 0.51 V). However. complex 2 displays an irreversible oxidation wave at 0.91 V. A weak emission is observed for complex 2 in CHCl3 at room temperature. [References: 34]