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New rhenium and zinc complexes of 2-formylpyridine N(4)-phenylthiosemicarbazone | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 23, 2014, Pages 352-367 | ||
| Author | ||
| Mohamad Jaber Al-Jeboori | ||
| Abstract | ||
| Abstract A New rhenium(V)-oxo, rhenium(III) and Zn(II) complexes [ReOCl2(L)], [Re(L)2]Cl and [ZnCl2(HL)](where; HL = 2-formylpyridine-N(4)-phenylthiosemicarbazone) have been synthesised and characterised. [ReOCl3(PPh3)2] and [ReO4]- in presence of PPh3 have been used as a starting material to prepare rhenium(V)-oxo and rhenium(III) complexes, while ZnCl2 is used to prepare the zinc complex. The new complexes have been characterised by microanalyses, IR, (UV-Vis.), 1H, 13C NMR, mass spectroscopy and molar conductance. These studies show the Re(III) ion is in a distorted octahedral environment with two tridentate deprotonated thiosemicarbazone binding as monoanionic ligands through the sulfur, pyridyl nitrogen and azamethinic nitrogen in which the complex does not result in isomeric mixtures. The geometry about Re(V) ion is a distorted octahedral environment with one tridentate deprotonated monoanionic ligand, two chloro ligands and oxo moiety. The NMR studies (1H, 13C) of [ReOCl2(L)] show the existence of the complex in two isomers in solution. On the other hand the geometry about Zn is a trigonal bipyramidal with one tridentate ligand in thion form, and two chloro ligands. | ||
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