Circular dichroism studies on the formation of complexes of (-)-7-chlorotetracycline with vanadium, chromium, and cobalt

Authors
Ahmad, N Safder, J Munir, C
Citation
N. Ahmad et al., Circular dichroism studies on the formation of complexes of (-)-7-chlorotetracycline with vanadium, chromium, and cobalt, MONATS CHEM, 130(2), 1999, pp. 267-274
Citations number
16
Categorie Soggetti
Chemistry
Journal title
MONATSHEFTE FUR CHEMIE
ISSN journal
00269247 → ACNP
Volume
130
Issue
2
Year of publication
1999
Pages
267 - 274
Database
ISI
SICI code
0026-9247(199902)130:2<267:CDSOTF>2.0.ZU;2-Y
Abstract
The complex formation of the chiral antibiotic (-)-7-chlorotetracycline ((- )-CTC) with VO(IV), Cr(III), and Co(II) in methanol/water (80:20 v/v) was s tudied using circular dichroism. The ligand forms soluble complexes of the composition [VO((-)-CTC)(3)](2+), [Cr((-)-CTC)(H2O)(4)](3+), and [Co((-)-CT C)(2)(H2O)(2)](2+) as predominat species in acidic solution (pH=3.2-4.9). T he CD spectra of the complex ions are interpreted and their formation const ants ape reported.