The Malaysian
Journal of Analytical Sciences Vol 10 No 1 (2006): 93 – 98
NEW MIXED LIGANDS COMPLEXES OF SAMARIUM(III) WITH DITHIOCARBAMATES AND 1,10-PHENANTHROLINE
Indah Raya, Ibrahim Baba & Bohari M. Yamin
School of Chemical Sciences & Food Technology,
Faculty
of Science & Technology, Universiti Kebangsaan Malaysia
43600 Bangi, Selangor
Abstract
A new series of samarium(III)
complexes with mixed ligands, dithiocarbamate
and 1,10-phenanthroline were successfully synthesized using “in situ” method.
Microelemental analysis data of the complexes are in agreement with the general
formula, Sm[S2CNR’R”]3phen (R’ = methyl, ethyl; R” = butyl, hepthyl, isopropyl,
isobutyl, benzyl and cyclohexyl; phen = 1,10-phenanthroline). Infrared spectra of
the complexes showed that the thioureide v(C-N)
band is in the regions 1450 - 1500
cm-1. The unsplitting band of v(C-S)in the region 930 — 1000 cm-1
indicates the bidentate nature of
the chelated dithiocarbamato ligands. The 13C NMR chemical shift of the
carbon atom of the N-CS2 group
appeared in the range of 202 - 220 ppm.
The crystal structure of tris(N,N-ethylbenzyldithiocarbamato)(1.10-phenanthroline)samarium(III)
supports the elemental and spectroscopic data in which three dithiocarbamato and
one phen ligands chelated to the central Zn atom in bidentate manner in a distorted
dodecahedron environment.
Keywords: Samarium; dithiocarbamate; crystal
structure.
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