ISSN:
0009-2940
Keywords:
Dinuclear palladium(II) complexes
;
Bis(1-methylimidazol-2-yl) ketone
;
Pyridine-2-thione
;
Pyrimidine-2-thione
;
4-Imidazoline-2-thione, 1-methyl-
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Three novel dinuclear palladium(II) complexes with the chelating ligand bis(1-methylimidazol-2-yl) ketone (bmik) as well as pyridine-2-thiolate (pyt), pyrimidine-2-thiolate (pymt), and 1-methylimidazole-2-thiolate (meimt) as bridging secondary ligands were prepared by reactions of diaqua[bis(1-methylimidazol-2-yl) ketone]palladium(II) nitrate with the ligands in aqueous solution. The thiolates bridge the two metal atoms in the μ-N,S mode. The structures of the following compounds were analyzed by single crystal X-ray diffraction: Bis(μ-pyridine-2-thiolato-N,S)-bis{[bis(1-methyl-imidazol-2-yl) ketone]palladium(II)}nitrate [Pd2(bmik)2-(pyt)2](NO3)2 · 5 H2O (1), bis(μ-pyrimidine-2-thiolato-N1,S)- bis{[bis(1-methylimidazol-2-yl) ketone]palladium(II)} nitrate [Pd2(bmik)2(pymt)2](NO3)2 · 5 H2O (2), and bis(μ-1-methyl-imidazole-2-thiolato-N3,S)-bis{[bis(1-methylimidazol-2-yl) ketone]palladium(II)} nitrate [Pd2(bmik)2(meimt)2](NO3)2 · 4.5 H2O (3). In the cases of 1 and 3 the bridging thiolate ligands show head-to-head orientation. For complex 2 a head-to-tail orientation of the pyrimidine-2-thiolates was found. The metal-metal distances vary from 2.963 Å in complex 3 and 2.915 Å in 1 to the shortest of 2.886 Á in 2. In addition to the X-ray crystallography the three compounds were characterized by 1H-NMR and IR spectroscopy.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19941271203
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