| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 299.35 KB | Adobe PDF | |||
| 274.33 KB | Adobe PDF |
Orientador(es)
Resumo(s)
Molybdenum and tungsten complexes containing the pypzH (3-(2-pyridyl)pyrazole) ligand as a chelating bidentate are prepared: [Mo(CO)(4)(pypzH)], cis-[MoBr(eta(3)-allyl)(CO)(2)(pypzH)], cis-[MoCl(eta(3)-methallyl)(CO)(2)(pypzH)], [MI2(CO)(3)(pypzH)] (M = Mo, W) from [Mo(CO)(4)(NBD)] or the adequate bis(acetonitrile) complexes. The deprotonation of the molybdenum allyl or methallyl complexes affords the bimetallic complexes [cis-{Mo(eta(3)-allyl)(CO)(2)(mu(2)-pypz)}](2) or [cis-{Mo(eta(3)-methallyl)(CO)(2)(mu(2)-pypz)}](2) (mu(2)-pypz = mu(2)-3-(2-pyridyl-kappa N-1) pyrazolate-2 kappa N-1). The allyl complex was subjected to an electrochemical study, which shows a marked connection between both metallic centres through the bridging pyridylpyrazolates.
Descrição
Palavras-chave
Pyrazole-Derived Ligands Metal-metal Interactions Spectroscopic Properties Crystal-Structure Coordination Chemistry Dynamic-Behavior Hydrogen-Bond Solid-State Tetranuclear Transition
Contexto Educativo
Citação
ARROYO, M.; [et al] – Molybdenum – and tungsten(II) monometallic 3-(2-pyridyl)pyrazole and bimetallic 3-(2-pyridyl)pyrazolate complexes. Dalton Transactions. ISSN: 1477-9226. Vol. 41, nr. 23 (2012), pp. 7017-7025
Editora
Royal Soc Chemistry