Sample records for sulfur complexes
from WorldWideScience.org

Sample records 1 - 2 shown.



1

Síntese e caracterização estrutural de complexos mono e bimetálicos de paládio e platina com ligantes contendo nitrogênio e enxofre/ Synthesis and structural characterization of palladium and platinum mono- and bimetallic complexes with ligands containing nitrogen and sulfur

Knupp, Vagner Fernandes; Nicesio, Isa Carla; Queiroz, Fernanda de Magalhães; Matos, Robson Mendes; Passos, Bernadette de F. Trigo
1997-08-01

Resumo em inglês The synthesis of several mono- and bimetallic platinum and palladium complexes are reported. The monometallic complexes are of the type MCl2(PEt3)2L (L=2-aminothiazol; benzothiazol; 2-imidazolidithione; M=Pt; Pd), and the bimetallic complexes (M2Cl4(PEt3) 2L) are derived from them. Infrared spectroscopic characterization of the monometallic complexes shows that the metal centre are coordinated through the N-endocyclic (L=2-aminothiazol; benzothiazol) and through the sulph (mais) ur when L=2-imidazolidithione. Coordination of a second metal fragment occurs via the sulphur atom (L=2-aminothiazol; benzothiazol) according to infrared studies. 31P{¹H} NMR spectroscopy suggest that the complexes have a cis- configuration since the ¹J Pt-P are around the value found for this type of compound.

Scientific Electronic Library Online (Portuguese)

2

Cinética e mecanismo da reação de auto-oxidação de S(IV) catalisada por íons metálicos de transição/ Kinetic and mechanism of S(IV) autoxidation reaction catalysed by transition metal ions

Pezza, Helena Redigolo; Lopes, Cristiane F. Fernandes; Suárez-Iha, Maria Encarnación V.; Coichev, Nina
1999-07-01

Resumo em inglês The oxidation process of sulfur (IV) species (SO2, HSO3- e SO32-) by oxygen, catalysed by trace metal ion and complexes, can play an important role in atmospheric, analytical and bioinorganic chemistry. An overview of the most important reactions in these fields is presented. A fascinating redox cycling of the metal ions and complexes during such autoxidation process was revealed by the combination of kinetics and coordination chemistry studies.

Scientific Electronic Library Online (Portuguese)