Synthesis and characterization of palladium(II) complexes of thioureas. X-ray structures of [Pd( N , N ?dimethylthiourea)₄]Cl₂?¡¤?2H₂O and [Pd(tetramethylthiourea)₄]Cl₂

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• 作者：Shafqat Nadeem ; Muhammad Khawar Rauf ; Saeed Ahmad ; Masahiro Ebihara ; Syed Ahmed Tirmizi ; Sarfaraz Ahmed Bashir and Amin Badshah
• 刊名：Transition Metal Chemistry
• 出版年：2009
• 出版时间：March, 2009
• 年：2009
• 卷：34
• 期：2
• 页码：197-202
• 全文大小：345.9 KB

文摘

Palladium(II) complexes of thiones having the general formula [Pd(L)₄]Cl₂, where L = thiourea (Tu), methylthiourea (Metu), N,N′-dimethylthiourea (Dmtu), and tetramethylthiourea (Tmtu) were prepared by reacting K₂[PdCl₄] with the corresponding thiones. The complexes have been characterized by elemental analysis, IR and NMR spectroscopy, and two of these, [Pd(Dmtu)₄]Cl₂ ¡¤ 2H₂O (1) and [Pd(Tmtu)₄]Cl₂ (2), by X-ray crystallography. An upfield shift in the >C=S resonance of thiones in 13C NMR and downfield shift in N–H resonance in 1H NMR are consistent in showing sulfur coordination with palladium(II). The crystal structures of the complexes show a square-planar coordination environment around the Pd(II) ions with the average cis and trans S–Pd–S bond angles of 89.64¡ã and 173.48¡ã, respectively.