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Complexation of 5-fluorosalicylic acid with copper(II): a pH-potentiometric, UV-vis spectroscopic, and electron spin resonance study by the two-dimensional simulation of spectra.

Abstract：

:The copper(II)-5-fluorosalicylic acid system was investigated in water and 50 v/v% water-methanol mixture by pH potentiometry combined with UV-vis spectrophotometry, and by the two-dimensional ESR simulation method, respectively. The data revealed that the stable paramagnetic mono- and bis(salicylato) copper(II) complexes [CuLH(-1)] and [CuL2H(-2)](2-) are formed, and at low excess of ligand, the ESR-silent mixed hydroxo complex [Cu2L2H(-3)](-) is also a major species. By the two-dimensional ESR simulation method, the species [CuL]+ in the acidic region, and the minor dimer [Cu2L2H(-2)] were also identified, and the cis and trans isomers of [CuL2H(-2)](2-) were characterized. In frozen solutions, the ESR analysis revealed a slight rhombic distortion of coordination polyhedra for the latter three species.

journal_name

J Inorg Biochem

journal_title

Journal of inorganic biochemistry

authors

Szabó-Plánka T,Gyurcsik B,Nagy NV,Rockenbauer A,Sípos R,Sima J,Melník M

doi

10.1016/j.jinorgbio.2007.07.019

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

101-9

issue

1

eissn

0162-0134

issn

1873-3344

pii

S0162-0134(07)00198-5

journal_volume

102

pub_type

杂志文章

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