Heptacoordination in Organotin(IV) Complexes: Spectroscopic and Structural Studies of 2,6-Diacetylpyridine bis(thiosemicarbazone)di-n-butyltin(IV) Chloride Nitromethane Solvate, [nBu2Sn(H2daptsc)]Cl 2?MeNO2 and of 2,6-Diacetylpyridine bis(semicarbazone)dimethyltin(IV) trans-Tetrachlorodimethylstannate(IV), [Me2Sn(H2dapsc)][Me2 SnCl4]

Autor:	Carlos A. L. Filgueiras, Rubén A. Toscano, Anuar Abras, Jesús Valdés-Martínez, Georgina E. Pérez, Gerimário F. de Sousa
Jazyk:	angličtina
Rok vydání:	2002
Předmět:	Nitromethane Stereochemistry General Chemistry Chloride Medicinal chemistry Heptacoordinate tin(IV) complexes lcsh:Chemistry chemistry.chemical_compound X-ray molecular structure chemistry lcsh:QD1-999 thiosemicarbazone complexes medicine Semicarbazone semicarbazone complexes medicine.drug
Zdroj:	Journal of the Brazilian Chemical Society, Vol 13, Iss 5, Pp 565-569 (2002) Journal of the Brazilian Chemical Society, Volume: 13, Issue: 5, Pages: 559-564, Published: SEP 2002 Journal of the Brazilian Chemical Society v.13 n.5 2002 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ
ISSN:	0103-5053
Popis:	Two new cases of heptacoordination in organotin(IV) complexes are described. Both possess pentagonal bipyramidal geometry and show the organic groups on the axial positions, with the ligands forming five bonds to tin(IV) on the equatorial plane. The first complex, [nBu2Sn(H2daptsc)]Cl2 •MeNO2 (1) is entirely new, whereas the second, [Me2Sn(H2dapsc)][Me2 SnCl4] (2), although previously reported, only now had its structure determined. In both 1 and 2 the heptacoordinate species are cationic, but whereas in 1 the counterion is simply Cl-, in 2 it is a complex anion, namely [Me2SnCl4]². Dois novos casos de heptacoordenação em complexos organoestânicos(IV) são descritos. Ambos possuem geometria pentagonal bipiramidal e mostram os grupos orgânicos nas posições axiais, com os ligantes formando cinco ligações no plano equatorial com os átomos de estanho(IV). O primeiro complexo [nBu2Sn(H2daptsc)]Cl2 •MeNO2 (1) é totalmente novo, ao passo que o segundo, [Me2Sn(H2dapsc)][Me2 SnCl4] (2), embora anteriormente descrito na literatura, somente agora teve a sua estrutura determinada. Tanto em 1 quanto em 2 as espécies heptacoordenadas são catiônicas; ao passo que em 1 o contra-íon é um simples Cl-, em 2 é um ânion complexo, isto é [Me2SnCl4]2-.
Databáze:	OpenAIRE
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