Sains Malaysiana 36(1): 15-20 (2007)
Gadolinium(III) Complexes with Dialkyldithiocarbamates and 1,10-Phenantroline (Kompleks Gadolinium(III) dengan Dialkilditiokarbamat dan 1, 10 Fenantrolina)
Indah Raya, Ibrahim Baba, Bohari Mohd Yamin & Djulia Onggo School of Chemical Sciences & Food Technology Faculty of Science and Technology, Universiti Kebangsaan Malaysia 43600 Bangi, Selangor, D.E. Malaysia
ABSTRACT
A new series of gadolinium complexes with mixed ligands, dialkyl dithiocarbamate and 1,10-Phenantroline were successfully synthesized using “in situ” methods. Microelemental analysis data of complexes are in agreement with the general formula Gd[S2CNR’R”]3Phen (R’ = ethyl, methyl; R” = butyl, heptyl, isopropyl, isobutyl, benzyl and cyclohexyl; Phen = 1,10-phenantroline). These complexes have been characterized using elemental analysis, infrared, thermogravimetric analysis, conductivity and magnetic measurements. Infrared spectra of complexes showed the thioureide n(C-N) bands were in the region of 1450 - 1490 cm-1. The single n(C-S) bands appeared in the region of 959 – 1003 cm-1 and n(C-H) bands in the region of 2853-2931 cm-1. The crystal structure of tris(N,N-methylbenzyldithiocarbamate)(1,10-phenantroline) gadolinium(III) adopts a triclinic system (space group Pī) with a distorted dodecahedron geometry with a = 11.04(6) Å , b = 12.65(7) Å, c = 17.13(10) Å, a =73.86o(8) b =74.54o(8) g = 72.34o(8) and Z = 2. Three dithiocarbamates and one phenanthroline ligands were coordinated to the central Gd atom in bidentate manner.
Keywords: Gadolinium; dithiocarbamate; crystal structure
ABSTRAK
Satu siri kompleks logam gadolinium baru dengan dialkilditiokarbamat dan 1,10-fenantrolin telah berjaya disintesis secara “in-situ”. Hasil analisis bersetuju dengan formula umum Gd[S2CNR’R”]3Phen (R’ = metil, etil; R” = butil, heptil, isopropil, isobutil, benzil dan sikloheksil; Phen = fenantrolina). Kompleks telah diciri dengan analisis unsur, spektroskopi inframerah, analisis termogravimetri, pengukuran kemagnetan dan pengukuran konduktiviti. Spektrum inframerah kompleks menunjukkan jalur tioureida n(C-N) berada di sekitar 1450-1490 cm-1, Manakala jalur tunggal n(C-S) pula berada di kawasan 959-1003 cm-1 dan jalur n(C-H) berada di kawasan 2853-2931 cm-1. Struktur hablur tris(N,N-metilbenzilditiokarbamat)(1,10-fenantrolin)gadolinium(III) menunjukkan sistem hablur triklinik (kumpulan ruang Pī) dengan geometri dodekahedron terherot dengan a = 11.04(6) Å, b = 12.65(7) Å, c = 17.13(10) Å, a =73.86o(8) b =74.54o(8) g = 72.34o(8) and Z = 2. Tiga molekul ditiokarbamat dan satu molekul fenantrolina memebentuk ikatan kelat kepada atom Gd secara bidentat.
Kata kunci: Gadolinium; ditiokarbamat; struktur hablur
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