Catalytic efficacy of Schiff-base copper(II) complexes: Synthesis, X-ray structure and olefin oxidation
2008; Elsevier BV; Volume: 27; Issue: 6 Linguagem: Inglês
10.1016/j.poly.2008.01.030
ISSN1873-3719
AutoresChandan Adhikary, Rajesh Bera, Buddhadeb Dutta, Sreyashi Jana, G. Bocelli, A. Cantoni, Siddhartha Chaudhuri, Subratanath Koner,
Tópico(s)Porphyrin and Phthalocyanine Chemistry
ResumoThree copper(II) Schiff-base complexes, [Cu(L1)(H2O)](ClO4) (1), [Cu(L2)] (2) and [Cu(L3)] (3) have been synthesized and characterized [where HL1 = 1-(N-ortho-hydroxy-acetophenimine)-2-methyl-pyridine], H2L2 = N,N′-(2-hydroxy-propane-1,3-diyl)-bis-salicylideneimine and H2L3 = N,N′-(2,2-dimethyl-propane-1,3-diyl)-bis-salicylideneimine]. The structure of complex 1 has been determined by single crystal X-ray diffraction analysis. In complex 1, the copper(II) ion is coordinated to one oxygen atom and two nitrogen atoms of the tridentate Schiff-base ligand, HL1. The fourth coordination site of the central metal ion is occupied by the oxygen atom from a water molecule. All the complexes exhibit high catalytic activity in the oxidation reactions of a variety of olefins with tert-butyl-hydroperoxide in acetonitrile. The catalytic efficacy of the copper(II) complexes towards olefin oxidation reactions has been studied in different solvent media.
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