Sains Malaysiana 39(6)(2010):
957–962
Synthesis
and Characterization of Mixed Ligand Complexes of Caffeine, Adenine and
Thiocyanate with Some Transition Metal Ions
(Sintesis
dan Pencirian Kompleks Ligan Campuran Kaffein, Adenin dan Tiosianat dengan Beberapa
Ion Logam Peralihan)
Shayma
A. Shaker* & Yang Farina
School
of Chemical Sciences & Food Technology, University Kebangsaan Malaysia
43600 UKM Bangi,
Selangor, Malaysia
Sadia
Mahmmod & Mohean Eskender
Chemistry
Department, Ibn-Alhaitham College of Education, University of Baghdad, Iraq
Diserahkan:
5 Oktober 2009 / Diterima: 10 Mac 2010
ABSTRACT
An
ethanolic solution of caffeine was added to an aqueous solution of metal salts
and followed by adding ethanolic solution of adenine and an aqueous solution of
potassium thiocyanate to give complexes with general formula [M(CA)2(Ad)X2]
where CA is caffeine, Ad is adenine, X is thiocyanate ion and M is Co(II),
Ni(II), Cu(II), Zn(II) and Cd(II). The resulting products were characterized
using UV-visible
and infrared spectroscopies. Elemental analyses were performed using C, H, N
analysis and atomic absorption techniques. The magnetic susceptibility and the
conductivity were also measured. The results suggested that the complexes have
octahedral geometry.
Keywords:
Adenine complexes; caffeine complexes; mixed ligand complexes; thiocyanate
complexes
ABSTRAK
Satu
larutan beretanol kafein telah ditambah kepada satu larutan berakueus garam
logam. Ini diikuti dengan menambahkan larutan beretanol adenina dan satu
larutan akueus kalium tiosianat untuk memberi kompleks dengan formula am [M(CA)2(Ad)X2]
dengan CA ialah kafein, Ad ialah adenine, ion X ialah tiosianat dan M=Co(II),
Ni(II), Cu(II), Zn(II) dan Cd(II). Produk yarg terhasil dicirikan menggunakan
spektroskopi UL-
nampak dan inframerah. Analisis unsur diusahakan menggunakan C, H, N analisis
dan teknik penyerapan atom. Kebolehrentanan magnet dan kekonduksian kompleks
juga diukur. Keputusan menunjukkan kompleks membentuk geometri oktahedron.
Kata
kunci: Kompleks adenine; kompleks kafein; kompleks ligan bercampur; kompleks
tiosianat
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*Pengarang
untuk surat-menyurat; email: drshaimaa611@yahoo.com
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