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Kinetic studies on the reversible ring opening–closure reaction of the triazine ligand and structural properties of palladium(II) complexes by Meishan Zhang; Masahiko Inamo; Masaaki Kojima; Kiyohiko Nakajima is a Chemistry article available to read on EtoBox.

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A Pd(II) complex containing didentate triazine ligand L 1 (2-(2-methylphenyl)-3-(2-pyridyl)-2,3-dihydronaphtho[2,1-e][1,2,4]triazine) [PdCl 2 (L 1 )] (1) was prepared, and the structure was determined by X-ray crystallography. The absorption spectrum of complex 1 in dichloromethane changed gradually with isosbestic points when methanol was added to the solution, and [PdCl(L 2 )] (2) (L 2 = N-[methoxy(2-pyridyl)methyl]-1-(2-methylphenylazo)-2-naphthylamide) was obtained from the resulting solution after the reaction was completed. Addition of hydrogen chloride to the solution of complex 2 led to the recovery of complex 1. Thus, a reversible ring opening and closure reaction of the triazine ligand was observed. The progress of the ring opening reaction was monitored by observing the absorbance changes at several wavelengths of the visible spectra as a function of the concentration of methanol. The absorbance plots were fitted successfully with a mechanism that includes the consumption of two methanol molecules and the release of HCl, whose concentration is equivalent to that of the produced Pd complex In dichloromethane with a low dielectric constant, the polar HCl molecule will be s

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Author

Meishan Zhang; Masahiko Inamo; Masaaki Kojima; Kiyohiko Nakajima

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)