کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1311295 | 975310 | 2010 | 8 صفحه PDF | دانلود رایگان |
Reactions of H[AuCl4] with N-substituted 2-pyridine thiocarboxamide ligands 2-(C5H4N)C(S)NHR (R = p-C6H4Me, CH2Ph, Me, p-C6H4OMe) gave cycloaurated derivatives {(C5H4N)C(S)NR}AuCl2, with the ligand bonded as the thiol tautomer through the deprotonated SH group and the pyridine N atom to give a five-membered metallacyclic ring. The X-ray structure determination of the R = CH2Ph derivative shows a square–planar gold(III) complex that dimerises in the solid state by weak Au···S intermolecular interactions. In contrast, in the reaction of H[AuCl4] with 2-(C5H4N)C(S)NHR where R = 2-pyridyl, the ligand was oxidised to give a 1,2,4-thiadiazolo[2,3-a]pyridinium heterocyclic ring that was crystallographically characterised.
2-Pyridine thiocarboxamides 2-(C5H5N)C(S)NHR (R = p-C6H4Me, CH2Ph, Me, p-C6H4OMe) undergo direct cycloauration with H[AuCl4]; the deprotonated ligand coordinates via the pyridyl nitrogen and sulphur atom. The ligand with R = 2-pyridyl reacted differently; instead of cycloauration, the ligand was oxidised to give a heterocyclic 1,2,4-thiadiazolo[2,3-a]pyridinium ring.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 363, Issue 1, 4 January 2010, Pages 41–48