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Capítulo 20
Propriedades dos Metais de Transição
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups…
Compostos de Coordenação e Nomenclatura
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For…
Ligações Metal-Ligando
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain…
Número e Geometria de Coordenação
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers…
Isomerismo Estrutural
Isomerism in Complexes Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can…
Estereoisomerismo
Isomers are different chemical species that have the same chemical formula. Transition metal complexes often exist as geometric isomers, in which…
Teoria da Ligação de Valência
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from…
Teoria do Campo Cristalino - Complexos Octaédricos
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons…
Teoria do Campo Cristalino - Complexos Tetraédricos e Quadrados Planos
Tetrahedral Complexes Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes…
Cores e Magnetismo
Color in Coordination Complexes When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals.…
Preparação de Complexos modelo sns cobalto(ii) de álcool hepático desidrogenase
Chemical model complexes are prepared to represent the active site of an enzyme. In this protocol, a family of tridentate pincer ligand precursors…
Imagem de Coulomb explosão como uma ferramenta para distinguir estereoisômeros
This article shows how the COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) or the "reaction microscope" technique can be used to distinguish…
Mediada por ligante de nucleação e crescimento de nanopartículas de Metal paládio
The size, size distribution and stability of colloidal nanoparticles are greatly affected by the presence of capping ligands. Despite the key…

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