Sains Malaysiana 33(2): 45-53 (2004)                                                                                          Sains Fizis dan Gunaan /

Physical and Applied Sciences

Synthesis and Characterization of

bis(N-benzyl-Nisopropyldithiocarbamato) zinc(II)

with Bidentate Nitrogen Ligands: Crystal Structure of

Zn[S₂CN (C₇H₇) (iC₃H₇)]₂(bipy)

Normah Awang. Ibrahim Baba. Y. Farina Abd. Aziz

& Bohari M. Yamin

School of Chemical Scineces & Food Technology

Faculty of Science & Technology

Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D.E. Malaysia

ABSTRACT

Two adducts of bis(N-benzyl-N-isopropyldithiocarbamato) zinc(II) with 2,2'­-bipyridine and 1,10-phenanthroline have been successfully synthesized and characterized by elemental analysis and spectroscopic studies. The IR spec­tra of these adducts showed the thioureide band, v(C---- N) which occurred at 1440 and 1438 cm^-1 respectively, lower than the parent compound at 1471 cm^-1. The ¹³C NMR spectroscopic data for these compounds showed that the carbon signal from CS₂ moiety shifted slightly downfield to 206.6 and 208.5 ppm compared to the parent compound at 205.1 ppm. The single crystal structure of bis (N-benzyl-N-isopropyldithiocarbamato )zinc(II)(bipy) has been determined. The structure of this compound showed monomeric nature with hexacoordination of the metal in a highly distorted octahedral geometry.

ABSTRAK

Dua sebatian aduk zink(II) benzilisopropilditiokarbamat dengan ligan 2,2-bipiridil dan 1,10-fenantrolin telah berjaya disediakan dan dianalisis menggunakan analisis unsur dan kaedah spektroskopi. Spektrum IR untuk kedua-dua sebatian aduk ini telah menunjukkan kehadiran jalur tioureida, V(C----- N) pada 1440 dan 1438 cm^-1 masing-masing yang mana jalur serapan ini didapati teranjak pada nilai yang lebih rendah berbanding sebatian asalnya iaitu pada 1471 cm^-1. Data RMN ¹³C pula menunjukkan kehadiran signal karbon CS₂ yang teranjak sedikit ke medan yang lebih rendah iaitu pada 206.6 dan 208.5 ppm masing-masing jika dibandingkan dengan sebatian asalnya pada 205.1 ppm. Struktur hablur tunggal bagi sebatian bis( N-benzil­-N-isopropilditiokarbamat)zink(11)(bipy) telah ditentukan. Struktur sebatian ini didapati bersifat monomerik dan berkoordinat enam dengan atom logam pusatnya mempunyai geometri oktahedron yang sangat terherot.

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