Structural and spectral studies of 1-phenylglyoxal bis(3-piperidylthiosemicarbazone) and its zinc(II), cadmium(II) and platinum(II) complexes

Citation
A. Castineiras et al., Structural and spectral studies of 1-phenylglyoxal bis(3-piperidylthiosemicarbazone) and its zinc(II), cadmium(II) and platinum(II) complexes, POLYHEDRON, 18(10), 1999, pp. 1463-1469
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
POLYHEDRON
ISSN journal
0277-5387 → ACNP
Volume
18
Issue
10
Year of publication
1999
Pages
1463 - 1469
Database
ISI
SICI code
0277-5387(1999)18:10<1463:SASSO1>2.0.ZU;2-C
Abstract
Zinc(II) and platinum(II) complexes of l-phenylglyoxal bis(3-piperidylthios emicarbazone), H(2)Pgpip, have been prepared and the crystal structures of H(2)Pgpip and the two metal complexes have been solved. The two arms of H(2 )Pgpip are on the same side of the carbon-carbon backbone and the N(2)H of the phenyl arm hydrogen bonds to the azomethine nitrogen of the aldehyde ar m. Loss of the N(2)H hydrogens from both thiosemicarbazone moieties occurs for [Pt(Pgpip)], resulting in coordination of the dianion Pgpip as a tetrad entate N2S2 ligand with the expected 5-5-5-chelate ring system. However, [Z n(HPgpip)Cl] involves the monoanion HPgpip on loss of the phenyl arm's N(2) H, resulting in a five-coordinate complex with coordination of the two azom ethine nitrogens, a thione sulfur (aldehyde arm), a thiolato sulfur (phenyl arm) and an axial chloro ligand in an approximately square pyramidal arran gement. (C) 1999 Elsevier Science Ltd. All rights reserved.