Some metal complexes of a new carboxylate derivative of l-ascorbic
Other Title(s)
تحضير و دراسات تركيبيه لمعقدات بعض الأيونات الفلزية مع مشتق جديد لمشتقات الكاربوكسيلات-L-حامض الاسكوربيك
Joint Authors
al-Waswi, Falih Hasan Musa Muhammad
Shanshal, Muthanna Abd al-Jabbar
al-Najjar, Nada Ali
Source
Issue
Vol. 57, Issue 2B (30 Jun. 2016), pp.1071-1085, 15 p.
Publisher
University of Baghdad College of Science
Publication Date
2016-06-30
Country of Publication
Iraq
No. of Pages
15
Main Subjects
Topics
Abstract EN
(4R)-2, 3-(2`-chloro-2`- carboxyl)-1, 3-dioxolano-4- (2- dimethyl –dioxolane -yl) ascorbic acid (HL), a derivative of L-ascorbic acid was prepared by the reaction of 5,6-O-isopropylidene–L-ascorbic acid with trichloroacetic acid in alkaline medium.
Seven new metal ion complexes of this ligand (HL) were prepared through its direct reaction with the chlorides of Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) ions respectively.
The new ligand and its ion metal complexes were characterized applying elemental analyses,1H and 13C NMR, IR as well as UV-Visible spectra.
Spectroscopic data showed that the ligand (C11H11O8Cl) was coordinated to the metal ions through the two oxygen atoms of the carboxyl group as abidentate ligand.
Electrical conductivity and magnetic measurements were done at room temperature.
Based on the obtained analytical data, the following molecular formulas for the prepared complexes are suggested; {[M(L)2(H2O)2].
xH2O where x = 0 for Mn(II), Ni(II), Cu(II);x = 2 for Co(II)}; [M(L)Cl(H2O)3] for Zn(II) and Cd(II); and [Hg(L)ClH2O].
Octahedral geometry is suggested for all the complexes, except for the (Hg) complex which shows a tetrahedral geometry.
Theoretical calculations of the molecular structure of the new ligand (HL) and its metal complexes were carried out too, applying the semi-empirical computation methods PM3 and PM6.The calculation results confirmed the suggested structures of all complexes.
American Psychological Association (APA)
al-Najjar, Nada Ali& Shanshal, Muthanna Abd al-Jabbar& al-Waswi, Falih Hasan Musa Muhammad. 2016. Some metal complexes of a new carboxylate derivative of l-ascorbic. Iraqi Journal of Science،Vol. 57, no. 2B, pp.1071-1085.
https://search.emarefa.net/detail/BIM-688390
Modern Language Association (MLA)
al-Najjar, Nada Ali…[et al.]. Some metal complexes of a new carboxylate derivative of l-ascorbic. Iraqi Journal of Science Vol. 57, no. 2B (2016), pp.1071-1085.
https://search.emarefa.net/detail/BIM-688390
American Medical Association (AMA)
al-Najjar, Nada Ali& Shanshal, Muthanna Abd al-Jabbar& al-Waswi, Falih Hasan Musa Muhammad. Some metal complexes of a new carboxylate derivative of l-ascorbic. Iraqi Journal of Science. 2016. Vol. 57, no. 2B, pp.1071-1085.
https://search.emarefa.net/detail/BIM-688390
Data Type
Journal Articles
Language
English
Notes
Text in English ; abstracts in English and Arabic.
Record ID
BIM-688390