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Preparation, Structural Characterization, and Antifungal Activities of Complexes of Group 12 Metals with 2-Acetylpyridine- and 2-Acetylpyridine-N-oxide-4N-phenylthiosemicarbazones

✍ Scribed by Elena Bermejo; Alfonso Castiñeiras; Ricardo Domínguez; Rosa Carballo; Cäcilia Maichle-Mössmer; Joachim Strähle; Douglas X. West

Publisher
John Wiley and Sons
Year
1999
Tongue
German
Weight
161 KB
Volume
625
Category
Article
ISSN
0372-7874

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✦ Synopsis

Reaction of group 12 metal dihalides in ethanolic media with 2-acetylpyridine 4 N-phenylthiosemicarbazone (H4PL) and 2-acetylpyridine-N-oxide 4 N-phenylthiosemicarbazone (H4PLO) afforded the compounds [M(H4PL)X 2 ] (X = Cl, Br, M = Zn, Cd, Hg; X = I, M = Zn, Cd) (1±8), [Hg(4PL)I] 2 ( 9) and [M(H4PLO)X 2 ] (X = Cl, Br, I, M = Zn, Cd, Hg) (10±18). H4PL, H4PLO and their complexes were characterized by elemental analysis and by IR and 1 H and 13 C NMR spectroscopy (and the cadmium complexes by 113 Cd NMR spectroscopy), and H4PL, H4PLO, (5 ´DMSO) and (9) were additionally studied by X-ray diffraction.

H4PL is N,N,S-tridentate in all its complexes, including 9, in which it is deprotonated, and H4PLO is in all cases O,N,Stridentate. In all the complexes, the metal atoms are pentacoordinate and the coordination polyhedra are redistorted tetragonal pyramids. In assays of antifungal activity against Aspergillus niger and Paecilomyces variotii, the only compound to show any activity was [Hg(H4PLO)I 2 ] (18).

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