Summary
Nickel(II) and palladium(II) complexes of the 1,3-di(o-aminophenylthio) propane (H2L1) and 1,2-di(o-aminophenylthio)xylene (H2L2) ligands have been prepared and characterized. The hydrobromide salt of H2L1 gave a 1∶2 ligand-metal complex of PdII, whereas free H2L1 formed the usual 1:1 species. The reaction of Na2PdCl4 with H2L2 resulted in S,S′-dealkylation of the ligand and formation of a mononuclear complex of the corresponding thiol, i.e. 2-aminobenzenethiol. NiCl2, NiBr2 and Ni(ClO4)2 did not react directly with H2L2. NiII is a fairly hard ion and therefore does not coordinate to the soft thioether moiety in H2L2 in the absence of soft anions which symbiotically motivate NiII to act as a soft acceptor. It thus does not react with H2L2 in the presence of hard ions such as Cl−, Br- and ClO −4 , but, the in situ reaction of the constituents produced the tetrahedral NiII complex, contrary to earlier reports of similar types of octahedral species.
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Pal, S., Poddar, S.N. & Mukherjee, G. Diaminodithioether complexes of nickel(II) and palladium(II): A unique case of dealkylation of S,S′-thioether. Transition Met Chem 19, 449–452 (1994). https://doi.org/10.1007/BF00139326
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DOI: https://doi.org/10.1007/BF00139326