20917-34-4Relevant academic research and scientific papers
Methyllead(IV) derivatives stabilized by DAPTSC2-: Synthesis and structures of new diorganolead(IV) complexes
Casas, Jose S.,Castellano, Eduardo E.,Ellena, Javier,Garcia-Tasende, Maria S.,Namor, Facundo,Sanchez, Agustin,Sordo, Jose,Vidarte, Maria J.
, p. 3742 - 3750 (2008/03/14)
The reaction of the bis(thiosemicarbazone) of dimethyl pyridine-2,6-diyl diketone, H2DAPTSC, with PbMe2(OAc)2, PbMePh(OAc)2 or PbPh2(OAc)2 in MeOH afforded the complexes [PbMe2(DAPTSC)], [PbMePh(DAPTSC)] or [PbPh 2-(DAPTSC)] (in the first two cases together with [Pb(DAPTSC)]). X-ray crystallography of the Pb(IV) complexes showed that the metal has a pentagonal bipyramidal coordination sphere. The N3,S 2-bound DAPTSC2- anion occupied the eguatorial plane and the organic groups were in the apical positions. These compounds retain the same coordination mode in DMSO solution. DAPTSC2- is also N 3,S2-bound in [Pb(DAPTSC)], a complex with a stereochemically active PbII lone pair. The reaction of PbPh 2Cl2 with H2DAPTSC, also in methanol at room temperature, afforded [PbPh2(H2DAPTSC)] 2[PbPh2Cl4]Cl2·6CH 3OH. X-ray crystallography of this centrosymmetric complex showed it to consist of two [PbPh2(H2DAPTSC)]2+ cations of similar structure to the neutral [PbR2(DAPTSC)] complexes, together with a trans-octahedral [PbPh2Cl4]2- anion and two Cl- anions. This compound decomposes in DMSO solution, probably evolving to H2DAPTSC and PbPh2Cl 2(DMSO)n. In order to evaluate the changes undergone by H2DAPTSC under metallation, the X-ray structure of the free molecule was also determined. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
