Synthesis, structural characterization and catalytic oxidation property of schiff base copper(ii) complexes

SHUANG HAN ^[1] ; YUAN WANG ^[2]
1. [1] Qiqihar University
  
  Qiqihar University
  
  China
2. [2] Qiqihar Environmental Monitoring Central Station
Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 59, Nº. 4, 2014, págs. 2753-2755
Idioma: inglés
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Resumen
- 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) Å³, 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) Å³, 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.