Diaminodithioether complexes of nickel(II) and palladium(II): A unique case of dealkylation ofS,S′-thioether

✍ Scribed by Shefali Pal; Sailendra Nath Poddar; Gurucharan Mukherjee

• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 342 KB
• Volume: 19
• Category: Article
• ISSN: 0340-4285
• DOI: 10.1007/bf00139326

✦ Synopsis

Nickel(II) and palladium(II) complexes of the 1,3-di(oaminophenylthio)propane (H2L 1) and 1,2-di(o-aminophenylthio)xylene (H2 L2) ligands have been prepared and characterized. The hydrobromide salt of H2 L1 gave a 1:2 ligand-metal complex of Pd u, whereas free H2 La formed the usual 1:1 species. The reaction of Na2PdC14 with H2 L2 resulted in S,S'-dealkylation of the ligand and formation of a mononuclear complex of the corresponding thiol, i.e. 2-aminobenzenethiol. NiCI2, NiBr 2 and Ni(C104) 2 did not react directly with H2 L2. Ni" is a fairly hard ion and therefore does not coordinate to the soft thioether moiety in H2L 2 in the absence of soft anions which symbiotically motivate Ni" to act as a soft acceptor. It thus does not react with HzL 2 in the presence of hard ions such as CI-, Br-and C10~-, but, the in situ reaction of the constituents produced the tetrahedral Ni n complex, contrary to earlier reports of similar types of octahedral species.