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Abstract
2-Benzoylpyridine-phenylhydrazone (H2BzPh), 2-benzoylpyridine- para-chloro-phenylhydrazone (H2BzpClPh), and 2-benzoylpyridine- para-nitro-phenyl (H2BzpNO 2Ph) hydrazone were obtained and fully characterized, as well as their zinc(II) complexes [Zn(H2BzPh)Cl 2] ( 1), [Zn(H2BzClPh)Cl 2] ( 2) and [Zn(H2BzpNO 2Ph)Cl 2] ( 3). During the syntheses of complex 1 a second product crystallized, which was characterized as [Zn(2BzPh) 2] ( 1a). Upon re-crystallization in 1:9 DMSO:acetone conversion of 2 into [Zn(H2BzpClPh)Cl 2] · H 2O ( 2a) and of 3 into [Zn(2BzpNO 2Ph)Cl(DMSO)] ( 3a) occurred. The crystal structures of 1a, 2a and 3a were determined. In 1a the two nearly perpendicular H2BzPh ligands give rise to a distorted octahedral environment around the metal. The 5-fold coordination around the metal is completed with two chloride ions in 2a and with one chloride and one oxygen atom from DMSO in 3a.
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