The Malaysian Journal of Analytical Sciences Vol 12 No 1 (2008): 245 – 250

 

 

KAJIAN KRISTALOGRAFI SINAR-X KOMPLEKS [µ-1(2-PIRIDIL-κN) ETANON 4- FENILTIOUREASEMIKARBAZONATO-κ²N¹, S] BIS[IODOMERKURI(II)] DAN BIS(N-4-METOKSIBENZOIL) -N’-O-TOLILTIOUREA-κS) DIIODOMERKURI(II)

 

Mohd Sukeri Mohd Yusof¹ & Bohari M. Yamin²

 

¹Jabatan Sains Kimia, Fakulti Sains dan Teknologi Malaysia,

Universiti Malaysia Terengganu,t, 21030 K. Terengganu.

²Pusat Pengajian Sains Kimia dan Teknologi Makanan, Fakulti Sains dan Teknologi,

Universiti Kebangsaan Malaysia,

43650 Bangi, Selangor.

 

Abstract

Both [µ-1(2-pyridyl-κN)ethanone 4-phenylthioureasemicarbazonato-κ²N¹,S]bis[iodomercury(II)], and Bis(N-4 methoxybenzoyl)-N’-o-tolylthiourea-κS)diiodomercury(II), complexes have the molecular formula of Hg₂(L)₂I₂  and Hg(L)₂I₂ where  L  is  the  ligand,  respectively.  They  also  crystallized  in                 monoclinic  system,  but  having  space  group  is  C2/c, a=18.466(3)Å,  b=16.745(2)Å,  c=13.9140(19)Å,  β=129.174(2)º  and  P2₁/c,  a=10.848(3)Å,  b=24.474(7)Å,  c=14.038(4)Å, β=92.206(4)º, respectively. In the first complex, the Schiff base ligands are coordinated to the mercury atom via their (NNS) donor atoms in a tridentate manner. The sulfur atoms act as a bridge connecting the Hg atoms, forming a rectangular base that almost perpendicular to the ligand planes, resulting in an open box-like structure. The geometry of the mercury atom is close to a square pyramid. However, the mercury atom in the mercury-thiourea complex is coordinated to the ligands via the thiono sulfur atoms in a monodentate manner and form a distorted tetrahedral geometry.

 

Keywords: mercury complex,  thiourea, benzoylthiourea

 

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