Resumen de Synthesis, structural characterization and catalytic oxidation property of schiff base copper(ii) complexes
Two new square planar mononuclear copper(II) complexes, [CuL¹] (1) and [CuL²(NCS)] (2), where L¹ is the dianionic form of the bis-Schiff base N,N'-bis(2-hydroxynaphthylmethylidene)-l,3-pentanediamine (H2L¹), and L² is the monoanionic form of 1-[(2-diethylaminoethylimino)methyl]naphthalen-2-ol (HL²), have been synthesized and characterized by physico-chemical methods and single-crystal X-ray diffraction. Complex (1) (C27H24CuN2O2) crystallizes as the orthorhombic space group Pbca, with unit cell dimensions a = 18.284(1) Å, b = 12.2373(7) Å, c = 19.775(1) Å, V = 4424.6(4) ų, Z = 8, R1 = 0.0421, wR2 = 0.0975, S = 1.054. Complex (2) (C18H21CuN3OS) crystallizes as the monoclinic space group P2/c, with unit cell dimensions a = 12.776(1) Å, b = 24.181(2) Å, c = 11.743(1) Å, β = 98.621(1)°, V = 3586.7(7) ų, Z = 8, R1 = 0.0520, wR2 = 0.1183, S = 1.012. X-ray analysis indicates that the Cu atoms in the complexes are in square planar coordination. The complexes were evaluated for their catalytic oxidation of cyclooctene and styrene with tert-butylhydroperoxide.
