The Malaysian Journal of Analytical Sciences, Vol 15 No 1 (2011): 106 - 112 106 SYNTHESIS AND CHARACTERIZATION OF DIPHENYLTIN(IV) DITHIOCARBAMATE COMPOUNDS (Sintesis dan Pencirian Sebatian Difenilstanum(IV) Ditiokarbamat) Amirah Faizah Abdul Muthalib, Ibrahim Baba*, Yang Farina, Mohd Wahid Samsudin School of Chemical Sciences & Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia *Corresponding author: aibi@ukm.my Abstract Ten compounds of diphenyltin(IV) with N-dialkyldithiocarbamate were successfully prepared using in situ methods. Elemental analysis data (C, H, N and S) showed an agreement with the general formula of (C 6 H 5 ) 2 Sn[S 2 CNR 1 R 2 ] (R 1 = CH 3 , C 2 H 5 , C 7 H 7 ; R 2 = C 2 H 5 , C 4 H 9 , C 6 H 11 , iC 3 H 7 , C 7 H 7 ). The structures of these compounds have been examined by infrared spectroscopy, ultraviolet, 1 H, 13 C & 119 Sn NMR spectroscopy and X-ray crystallography. The infrared spectra of these compounds showed three important peaks for v(C N), v(C S) and v(C S) bands that appeared in the region of 1474 -1499, 969 - 995 and 324 - 335 cm -1 respectively. Data for 13 C NMR spectroscopy showed an important peak in the region of 198 – 200 ppm that corresponded to the NCS 2 group. Single crystal X-ray diffraction studies showed (C 6 H 5 ) 2 Sn[S 2 CN(C 2 H 5 )(CH 3 )] 2 (1) is six coordinated and adopted a monoclinic system with space group C2/c, while (C 6 H 5 ) 2 SnCl[S 2 CN(C 7 H 7 )(iC 3 H 7 )] (2) is five coordinated, crystallized in monoclinic system with space group Pb 1 /n. Meanwhile, six coordinated (C 6 H 5 ) 2 Sn[S 2 CN(CH 3 )(iC 3 H 7 )] 2 (3) adopted a orthorhombic system with a space group Pbcn. Keywords: diphenyltin(IV), dithiocarbamate. Abstrak Sepuluh kompleks daripada difenilstanum(IV) dengan N-dialkilditiokarbamat telah berjaya disediakan menggunakan cara in situ. Data analisis unsur (C, H, N dan S) terhadap semua kompleks telah menunjukkan persetujuan dengan formula umum (C 6 H 5 ) 2 Sn[S 2 CNR 1 R 2 ] (R 1 = CH 3 , C 2 H 5 , C 7 H 7 ; R 2 = C 2 H 5 , C 4 H 9 , C 6 H 11 , iC 3 H 7 , C 7 H 7 ). Struktur kesemua sebatian dapat ditentukan dengan menggunakan spektroskopi inframerah, ultralembayung, 1 H, 13 C dan 119 Sn RMN dan kristalografi sinar-X. Spektrum inframerah bagi sebatian ini menunjukkan tiga jalur penting, iaitu jalur v(C N), (C S) dan v(Sn-S) yang wujud masing-masing pada julat 1474 -1499, 969 - 995 dan 324 - 335 cm -1 . Data daripada 13 C RMN menunjukkan puncak pada julat 198 – 200 ppm yang menandakan wujudnya kumpulan NCS 2 . Struktur hablur tunggal (C 6 H 5 ) 2 Sn[S 2 CN(C 2 H 5 )(CH 3 )] 2 (1) dan (C 6 H 5 ) 2 SnCl[S 2 CN(C 7 H 7 )(iC 3 H 7 )] (3) mempunyai sistem monoklinik dengan masing-masing mempunyai kumpulan ruang C2/c dan P2 1 /n dengan sebatian pertama mempunyai struktur enam koordinatan dan struktur kedua membentuk lima koordinatan. Manakala (C 6 H 5 ) 2 Sn[S 2 CN(CH 3 )(iC 3 H 7 )] 2 (2) menunjukkan sistem ortorombik dengan kumpulan ruang Pbcn dengan membentuk struktur enam koordinatan. Kata kunci: difenilstanum(IV), ditiokarbamat. Introduction Organotin(IV) compounds have received tremendous attention for their synthesis, characterization and biological activities and their ability to bind with sulfur ligand such as thione or dithiocarbamate [1]. Furthermore, tin compound has an ability to form stable bonds with carbon as well as heteroatoms that have received much attention both in academic and applied research [2]. X-ray crystallographic studies of the dithiocarbamate compounds of diorganotin(IV) have shown a variety of coordination environments around the central tin atoms such as molecular geometry, ranging from tetrahedral to distorted octahedral [3]. The ligands coordinated to the tin atom may also display interesting bonding capabilities as two sulfur atoms can act as an S,S-bridging ligand [4]. Organotin compounds are widely used in chemical industries such as antifouling agents, plastic stabilizers, wood